anchor.diff:  MILLENIUM PARK,2014,1,0
   MILLENIUM PARK,2015,1,2
   MILLENIUM PARK,2016,0,4
  -MILLENIUM PARK,2017,0,3
  -MILLENIUM PARK,2018,0,3
  +MILLENIUM PARK,2017,0,4
  +MILLENIUM PARK,2018,0,4
   "MONTCLARE, GALEWOOD",1901,0,1
   "MONTCLARE, GALEWOOD",1997,0,1
   "MONTCLARE, GALEWOOD",1999,0,1
   "MONTCLARE, GALEWOOD",2001,0,1
  -"MONTCLARE, GALEWOOD",2002,186,4
  +"MONTCLARE, GALEWOOD",2002,187,4
   "MONTCLARE, GALEWOOD",2003,37,27
  -"MONTCLARE, GALEWOOD",2004,37,15
  +"MONTCLARE, GALEWOOD",2004,38,16
   "MONTCLARE, GALEWOOD",2005,23,40
   "MONTCLARE, GALEWOOD",2006,27,32
   "MONTCLARE, GALEWOOD",2007,25,42
   "MONTCLARE, GALEWOOD",2008,20,13
   "MONTCLARE, GALEWOOD",2009,18,13
  -"MONTCLARE, GALEWOOD",2010,23,36
  -"MONTCLARE, GALEWOOD",2011,20,12
  +"MONTCLARE, GALEWOOD",2010,23,37
  +"MONTCLARE, GALEWOOD",2011,20,13
   "MONTCLARE, GALEWOOD",2012,21,28
   "MONTCLARE, GALEWOOD",2013,19,23
   "MONTCLARE, GALEWOOD",2014,22,29
  -"MONTCLARE, GALEWOOD",2015,10,22
  -"MONTCLARE, GALEWOOD",2016,5,43
  -"MONTCLARE, GALEWOOD",2017,0,51
  -"MONTCLARE, GALEWOOD",2018,0,62
  +"MONTCLARE, GALEWOOD",2015,11,22
  +"MONTCLARE, GALEWOOD",2016,8,43
  +"MONTCLARE, GALEWOOD",2017,0,52
  +"MONTCLARE, GALEWOOD",2018,0,65
   "MOUNT GREENWOOD,MORGAN PARK",2001,0,1
  -"MOUNT GREENWOOD,MORGAN PARK",2002,285,22
  -"MOUNT GREENWOOD,MORGAN PARK",2003,78,55
  +"MOUNT GREENWOOD,MORGAN PARK",2002,284,23
  +"MOUNT GREENWOOD,MORGAN PARK",2003,78,56
   "MOUNT GREENWOOD,MORGAN PARK",2004,56,58
   "MOUNT GREENWOOD,MORGAN PARK",2005,57,65
  -"MOUNT GREENWOOD,MORGAN PARK",2006,48,52
  -"MOUNT GREENWOOD,MORGAN PARK",2007,46,53
  -"MOUNT GREENWOOD,MORGAN PARK",2008,46,2
  -"MOUNT GREENWOOD,MORGAN PARK",2009,39,90
  -"MOUNT GREENWOOD,MORGAN PARK",2010,37,3
  -"MOUNT GREENWOOD,MORGAN PARK",2011,25,66
  +"MOUNT GREENWOOD,MORGAN PARK",2006,48,51
  +"MOUNT GREENWOOD,MORGAN PARK",2007,46,54
  +"MOUNT GREENWOOD,MORGAN PARK",2008,47,2
  +"MOUNT GREENWOOD,MORGAN PARK",2009,39,91
  +"MOUNT GREENWOOD,MORGAN PARK",2010,37,4
  +"MOUNT GREENWOOD,MORGAN PARK",2011,25,67
   "MOUNT GREENWOOD,MORGAN PARK",2012,27,20
  -"MOUNT GREENWOOD,MORGAN PARK",2013,33,64
  +"MOUNT GREENWOOD,MORGAN PARK",2013,34,64
   "MOUNT GREENWOOD,MORGAN PARK",2014,23,15
  -"MOUNT GREENWOOD,MORGAN PARK",2015,34,54
  -"MOUNT GREENWOOD,MORGAN PARK",2016,7,43
  -"MOUNT GREENWOOD,MORGAN PARK",2017,0,178
  +"MOUNT GREENWOOD,MORGAN PARK",2015,34,52
  +"MOUNT GREENWOOD,MORGAN PARK",2016,8,43
  +"MOUNT GREENWOOD,MORGAN PARK",2017,0,174
   "MOUNT GREENWOOD,MORGAN PARK",2018,0,15
  -MUSEUM CAMPUS,2002,14,2
  +MUSEUM CAMPUS,2002,15,2
   MUSEUM CAMPUS,2003,3,1
   MUSEUM CAMPUS,2004,1,0
   MUSEUM CAMPUS,2005,3,4
   MUSEUM CAMPUS,2006,3,0
   MUSEUM CAMPUS,2007,2,4
  -MUSEUM CAMPUS,2008,3,2
  +MUSEUM CAMPUS,2008,3,1
   MUSEUM CAMPUS,2009,2,1
  -MUSEUM CAMPUS,2010,2,3
  -MUSEUM CAMPUS,2011,3,2
  +MUSEUM CAMPUS,2010,2,4
  +MUSEUM CAMPUS,2011,2,2
   MUSEUM CAMPUS,2012,2,1
   MUSEUM CAMPUS,2013,5,3
   MUSEUM CAMPUS,2014,0,2
  
positive.code: MUSEUM CAMPUS,2018,0,1
  NEAR SOUTH SIDE,1997,0,3
  NEAR SOUTH SIDE,2001,0,2
  NEAR SOUTH SIDE,2002,269,20
  NEAR SOUTH SIDE,2003,87,46
  NEAR SOUTH SIDE,2004,69,43
  NEAR SOUTH SIDE,2005,60,61
  NEAR SOUTH SIDE,2006,54,43
  NEAR SOUTH SIDE,2007,59,44
  NEAR SOUTH SIDE,2008,37,45
  NEAR SOUTH SIDE,2009,45,5
  NEAR SOUTH SIDE,2010,50,74
  NEAR SOUTH SIDE,2011,57,2
  NEAR SOUTH SIDE,2012,61,78
  NEAR SOUTH SIDE,2013,60,31
  NEAR SOUTH SIDE,2014,44,71
  NEAR SOUTH SIDE,2015,32,49
  NEAR SOUTH SIDE,2016,9,214
  NEAR SOUTH SIDE,2017,0,94
  NEAR SOUTH SIDE,2018,0,21
  NORTH CENTER,1996,0,1
  NORTH CENTER,1997,0,2
  NORTH CENTER,1998,0,2
  NORTH CENTER,1999,0,1
  NORTH CENTER,2000,0,2
  NORTH CENTER,2002,708,10
  NORTH CENTER,2003,123,88
  NORTH CENTER,2004,132,86
  NORTH CENTER,2005,91,135
  NORTH CENTER,2006,115,84
  NORTH CENTER,2007,109,106
  NORTH CENTER,2008,90,124
  NORTH CENTER,2009,108,63
  NORTH CENTER,2010,92,145
  NORTH CENTER,2011,75,22
  NORTH CENTER,2012,78,125
  NORTH CENTER,2013,66,41
  NORTH CENTER,2014,66,110
  NORTH CENTER,2015,76,63
  NORTH CENTER,2016,16,472
  NORTH CENTER,2017,0,214
  NORTH CENTER,2018,0,47
  NORTH LAWNDALE,1998,0,2
  NORTH LAWNDALE,2001,0,2
  NORTH LAWNDALE,2002,389,31
  NORTH LAWNDALE,2003,120,93
  NORTH LAWNDALE,2004,89,76
  NORTH LAWNDALE,2005,107,85
  NORTH LAWNDALE,2006,75,90
  NORTH LAWNDALE,2007,69,53
  NORTH LAWNDALE,2008,63,80
  NORTH LAWNDALE,2009,63,18
  NORTH LAWNDALE,2010,67,124
  NORTH LAWNDALE,2011,52,22
  NORTH LAWNDALE,2012,62,99
  NORTH LAWNDALE,2013,45,34
  NORTH LAWNDALE,2014,48,105
  NORTH LAWNDALE,2015,42,51
  NORTH LAWNDALE,2016,11,240
  NORTH LAWNDALE,2017,0,88
  NORTH LAWNDALE,2018,0,27
  "NORTH PARK,ALBANY PARK",1996,0,2
  "NORTH PARK,ALBANY PARK",1997,0,1
  "NORTH PARK,ALBANY PARK",1998,0,3
  "NORTH PARK,ALBANY PARK",2000,0,2
  "NORTH PARK,ALBANY PARK",2001,0,4
  "NORTH PARK,ALBANY PARK",2002,854,53
  "NORTH PARK,ALBANY PARK",2003,214,177
  "NORTH PARK,ALBANY PARK",2004,195,179
  "NORTH PARK,ALBANY PARK",2005,186,174
  "NORTH PARK,ALBANY PARK",2006,146,167
  "NORTH PARK,ALBANY PARK",2007,139,155
  "NORTH PARK,ALBANY PARK",2008,126,37
  "NORTH PARK,ALBANY PARK",2009,132,213
  "NORTH PARK,ALBANY PARK",2010,113,50
  "NORTH PARK,ALBANY PARK",2011,106,167
  "NORTH PARK,ALBANY PARK",2012,104,46
  "NORTH PARK,ALBANY PARK",2013,86,160
  "NORTH PARK,ALBANY PARK",2014,102,77
  "NORTH PARK,ALBANY PARK",2015,97,151
  "NORTH PARK,ALBANY PARK",2016,26,220
  "NORTH PARK,ALBANY PARK",2017,0,493
  "NORTH PARK,ALBANY PARK",2018,0,65
  NORWOOD PARK,1996,0,2
  NORWOOD PARK,1999,0,1
  NORWOOD PARK,2001,0,1
  NORWOOD PARK,2002,454,20
  NORWOOD PARK,2003,92,59
  NORWOOD PARK,2004,61,58
  NORWOOD PARK,2005,55,76
  NORWOOD PARK,2006,66,70
  NORWOOD PARK,2007,41,45
  NORWOOD PARK,2008,49,26
  NORWOOD PARK,2009,51,46
  NORWOOD PARK,2010,33,57
  NORWOOD PARK,2011,47,33
  NORWOOD PARK,2012,25,47
  NORWOOD PARK,2013,33,39
  NORWOOD PARK,2014,35,49
  NORWOOD PARK,2015,29,50
  NORWOOD PARK,2016,8,227
  NORWOOD PARK,2017,0,180
  NORWOOD PARK,2018,0,21
  "OAKLAND,KENWOOD",2002,11,0
  "OAKLAND,KENWOOD",2003,15,3
  "OAKLAND,KENWOOD",2004,9,3
  "OAKLAND,KENWOOD",2005,4,11
  "OAKLAND,KENWOOD",2006,3,8
  "OAKLAND,KENWOOD",2007,1,3
  "OAKLAND,KENWOOD",2008,7,1
  "OAKLAND,KENWOOD",2009,8,7
  "OAKLAND,KENWOOD",2010,2,3
  "OAKLAND,KENWOOD",2011,4,8
  "OAKLAND,KENWOOD",2012,3,1
  "OAKLAND,KENWOOD",2013,6,6
  "OAKLAND,KENWOOD",2014,6,6
  "OAKLAND,KENWOOD",2015,6,9
  "OAKLAND,KENWOOD",2016,2,6
  "OAKLAND,KENWOOD",2017,0,11
  "OAKLAND,KENWOOD",2018,0,3
  OHARE,2001,0,1
  OHARE,2002,199,11
  OHARE,2003,46,35
  OHARE,2004,39,32
  OHARE,2005,40,33
  OHARE,2006,38,31
  OHARE,2007,41,39
  OHARE,2008,29,14
  OHARE,2009,42,31
  OHARE,2010,21,45
  OHARE,2011,21,17
  OHARE,2012,27,33
  OHARE,2013,16,31
  OHARE,2014,12,28
  OHARE,2015,10,22
  OHARE,2016,5,96
  OHARE,2017,0,62
  OHARE,2018,0,17
  OLD TOWN,1998,0,1
  OLD TOWN,1999,0,1
  OLD TOWN,2000,0,1
  OLD TOWN,2002,373,4
  OLD TOWN,2003,82,42
  OLD TOWN,2004,90,63
  OLD TOWN,2005,50,78
  OLD TOWN,2006,65,61
  OLD TOWN,2007,65,61
  OLD TOWN,2008,44,32
  OLD TOWN,2009,49,41
  OLD TOWN,2010,35,47
  OLD TOWN,2011,39,38
  OLD TOWN,2012,46,52
  OLD TOWN,2013,41,33
  OLD TOWN,2014,30,66
  OLD TOWN,2015,45,38
  OLD TOWN,2016,4,96
  OLD TOWN,2017,0,182
  OLD TOWN,2018,0,103
  PORTAGE PARK,1996,0,2
  PORTAGE PARK,1997,0,1
  PORTAGE PARK,1998,0,2
  PORTAGE PARK,1999,0,3
  PORTAGE PARK,2000,0,1
  PORTAGE PARK,2001,0,2
  PORTAGE PARK,2002,987,45
  PORTAGE PARK,2003,212,159
  PORTAGE PARK,2004,205,168
  PORTAGE PARK,2005,145,182
  PORTAGE PARK,2006,144,142
  PORTAGE PARK,2007,128,173
  PORTAGE PARK,2008,97,8
  PORTAGE PARK,2009,103,236
  PORTAGE PARK,2010,83,19
  PORTAGE PARK,2011,87,185
  PORTAGE PARK,2012,108,44
  PORTAGE PARK,2013,90,172
  PORTAGE PARK,2014,110,69
  PORTAGE PARK,2015,78,129
  PORTAGE PARK,2016,15,171
  PORTAGE PARK,2017,0,628
  PORTAGE PARK,2018,0,50
  PRINTERS ROW,2001,0,3
  PRINTERS ROW,2002,72,6
  PRINTERS ROW,2003,12,10
  PRINTERS ROW,2004,11,12
  PRINTERS ROW,2005,13,6
  PRINTERS ROW,2006,3,8
  PRINTERS ROW,2007,9,5
  PRINTERS ROW,2008,15,3
  PRINTERS ROW,2009,9,2
  PRINTERS ROW,2010,3,19
  PRINTERS ROW,2011,10,0
  PRINTERS ROW,2012,7,13
  PRINTERS ROW,2013,7,5
  PRINTERS ROW,2014,5,12
  PRINTERS ROW,2015,9,6
  PRINTERS ROW,2016,3,50
  PRINTERS ROW,2017,0,20
  PRINTERS ROW,2018,0,6
  PULLMAN,2001,0,1
  PULLMAN,2002,96,14
  PULLMAN,2003,28,20
  PULLMAN,2004,17,16
  PULLMAN,2005,17,22
  PULLMAN,2006,14,9
  PULLMAN,2007,17,12
  PULLMAN,2008,10,0
  PULLMAN,2009,9,20
  PULLMAN,2010,9,2
  PULLMAN,2011,10,23
  PULLMAN,2012,7,3
  PULLMAN,2013,9,11
  PULLMAN,2014,17,7
  PULLMAN,2015,8,14
  PULLMAN,2016,0,27
  PULLMAN,2017,0,58
  PULLMAN,2018,0,4
  RIVER NORTH,1996,0,1
  RIVER NORTH,1997,0,4
  RIVER NORTH,1998,0,7
  RIVER NORTH,2000,0,5
  RIVER NORTH,2001,0,2
  RIVER NORTH,2002,1609,26
  RIVER NORTH,2003,437,193
  RIVER NORTH,2004,341,190
  RIVER NORTH,2005,229,236
  RIVER NORTH,2006,209,218
  RIVER NORTH,2007,227,189
  RIVER NORTH,2008,439,206
  RIVER NORTH,2009,167,55
  RIVER NORTH,2010,175,451
  RIVER NORTH,2011,168,49
  RIVER NORTH,2012,209,434
  RIVER NORTH,2013,159,104
  RIVER NORTH,2014,165,339
  RIVER NORTH,2015,163,131
  RIVER NORTH,2016,32,802
  RIVER NORTH,2017,0,495
  RIVER NORTH,2018,0,538
  RIVERDALE,2002,50,1
  RIVERDALE,2003,12,8
  RIVERDALE,2004,8,11
  RIVERDALE,2005,3,10
  
negative.code: MIDWAY AIRPORT,2011,23,8
  MIDWAY AIRPORT,2012,23,41
  MIDWAY AIRPORT,2013,17,18
  MIDWAY AIRPORT,2014,15,47
  MIDWAY AIRPORT,2015,17,14
  MIDWAY AIRPORT,2016,3,52
  MIDWAY AIRPORT,2017,0,74
  MIDWAY AIRPORT,2018,0,142
  MILLENIUM PARK,2003,2,0
  MILLENIUM PARK,2004,3,0
  MILLENIUM PARK,2005,0,1
  