anchor.diff:  "Philippines",PH,1992,7.97743129294012
   "Philippines",PH,1991,7.55969014267097
   "Philippines",PH,1990,6.70258987083332
  -"Poland",PL,2013,1.823990709
  -"Poland",PL,2012,1.85351158
  -"Poland",PL,2011,1.823435381
  -"Poland",PL,2010,1.819995772
  -"Poland",PL,2009,1.857446806
  -"Poland",PL,2008,1.856510023
  -"Poland",PL,2007,1.844662055
  -"Poland",PL,2006,1.842184913
  -"Poland",PL,2005,1.869116126
  -"Poland",PL,2004,1.862138166
  -"Poland",PL,2003,1.840645462
  -"Poland",PL,2002,1.829104344
  -"Poland",PL,2001,1.859152672
  -"Poland",PL,2000,1.838946027
  -"Poland",PL,1999,1.740092003
  -"Poland",PL,1998,1.657671667
  -"Poland",PL,1997,1.517463382
  -"Poland",PL,1996,1.358572021
  -"Poland",PL,1995,1.178692971
  -"Poland",PL,1994,0.940222148
  -"Poland",PL,1993,0.699707984
  -"Poland",PL,1992,0.548334547
  -"Poland",PL,1991,0.404571339
  -"Poland",PL,1990,0.269250745
  -"Portugal",PT,2013,0.611698776
  -"Portugal",PT,2012,0.617043936
  -"Portugal",PT,2011,0.627576037
  -"Portugal",PT,2010,0.631983672
  -"Portugal",PT,2009,0.630853443
  -"Portugal",PT,2008,0.649208599
  -"Portugal",PT,2007,0.660402974
  -"Portugal",PT,2006,0.66111729
  -"Portugal",PT,2005,0.684330207
  -"Portugal",PT,2004,0.716444053
  -"Portugal",PT,2003,0.705849856
  -"Portugal",PT,2002,0.708096481
  -"Portugal",PT,2001,0.705020778
  -"Portugal",PT,2000,0.698863698
  -"Portugal",PT,1999,0.696703742
  -"Portugal",PT,1998,0.692865622
  -"Portugal",PT,1997,0.672080113
  -"Portugal",PT,1996,0.660699954
  -"Portugal",PT,1995,0.650084822
  -"Portugal",PT,1994,0.641645954
  -"Portugal",PT,1993,0.610849871
  -"Portugal",PT,1992,0.582424684
  -"Portugal",PT,1991,0.534524592
  -"Portugal",PT,1990,0.501701086
  +"Poland",PL,2013,1.821618
  +"Poland",PL,2012,1.833667
  +"Poland",PL,2011,1.82756
  +"Poland",PL,2010,1.820199
  +"Poland",PL,2009,1.864433
  +"Poland",PL,2008,1.85651
  +"Poland",PL,2007,1.843004
  +"Poland",PL,2006,1.843065
  +"Poland",PL,2005,1.869116
  +"Poland",PL,2004,1.860591
  +"Poland",PL,2003,1.838458
  +"Poland",PL,2002,1.829104
  +"Poland",PL,2001,1.859846
  +"Poland",PL,2000,1.840198
  +"Poland",PL,1999,1.740092
  +"Poland",PL,1998,1.658741
  +"Poland",PL,1997,1.51814
  +"Poland",PL,1996,1.357921
  +"Poland",PL,1995,1.176413
  +"Poland",PL,1994,0.938401
  +"Poland",PL,1993,0.698348
  +"Poland",PL,1992,0.547266
  +"Poland",PL,1991,0.403779
  +"Poland",PL,1990,0.26873
  +"Portugal",PT,2013,0.588847
  +"Portugal",PT,2012,0.593149
  +"Portugal",PT,2011,0.619562
  +"Portugal",PT,2010,0.632054
  +"Portugal",PT,2009,0.633226
  +"Portugal",PT,2008,0.649209
  +"Portugal",PT,2007,0.65981
  +"Portugal",PT,2006,0.661433
  +"Portugal",PT,2005,0.68433
  +"Portugal",PT,2004,0.715849
  +"Portugal",PT,2003,0.705011
  +"Portugal",PT,2002,0.708096
  +"Portugal",PT,2001,0.705284
  +"Portugal",PT,2000,0.699339
  +"Portugal",PT,1999,0.696704
  +"Portugal",PT,1998,0.693313
  +"Portugal",PT,1997,0.67238
  +"Portugal",PT,1996,0.660384
  +"Portugal",PT,1995,0.648827
  +"Portugal",PT,1994,0.640403
  +"Portugal",PT,1993,0.609663
  +"Portugal",PT,1992,0.581289
  +"Portugal",PT,1991,0.533478
  +"Portugal",PT,1990,0.500731
   "Puerto Rico",PR,2013,0.820922202433127
   "Puerto Rico",PR,2012,0.811830516753133
   "Puerto Rico",PR,2011,0.7977296
  
positive.code: "Bulgaria",BG,1992,0.00474593281555904
  "Bulgaria",BG,1991,0.00304186963451547
  "Bulgaria",BG,1990,0.000962435922193065
  "Burkina Faso",BF,2013,223.154763683624
  "Burkina Faso",BF,2012,224.919765472469
  "Burkina Faso",BF,2011,213.659171587501
  "Burkina Faso",BF,2010,204.061092193197
  "Burkina Faso",BF,2009,198.257984474518
  "Burkina Faso",BF,2008,194.983679576078
  "Burkina Faso",BF,2007,182.066024098063
  "Burkina Faso",BF,2006,183.683002333962
  "Burkina Faso",BF,2005,189.666963708441
  "Burkina Faso",BF,2004,188.722642363387
  "Burkina Faso",BF,2003,193.728056983037
  "Burkina Faso",BF,2002,194.694456619248
  "Burkina Faso",BF,2001,190.370327694309
  "Burkina Faso",BF,2000,188.712322322173
  "Burkina Faso",BF,1999,194.609626136755
  "Burkina Faso",BF,1998,189.010169283033
  "Burkina Faso",BF,1997,177.005515552446
  "Burkina Faso",BF,1996,177.292387525493
  "Burkina Faso",BF,1995,179.896146151529
  "Burkina Faso",BF,1994,172.008145873385
  "Burkina Faso",BF,1993,153.23033804168
  "Burkina Faso",BF,1992,159.176539338749
  "Burkina Faso",BF,1991,162.438086557855
  "Burkina Faso",BF,1990,174.757437816284
  "Burundi",BI,2013,538.254153592457
  "Burundi",BI,2012,482.721027672943
  "Burundi",BI,2011,425.76830071686
  
negative.code: "Tajikistan",TJ,1992,7.45064367151016E-05
  "Tajikistan",TJ,1991,1.13099234367177E-05
  "Tajikistan",TJ,1990,5.85126367534189E-06
  "Tanzania",TZ,2013,597.903764375317
  "Tanzania",TZ,2012,571.418537899934
  "Tanzania",TZ,2011,522.483236812375
  "Tanzania",TZ,2010,478.72872089325
  "Tanzania",TZ,2009,446.606389506224
  "Tanzania",TZ,2008,410.102815848071
  "Tanzania",TZ,2007,362.020108598322
  "Tanzania",TZ,2006,266.900844058933
  "Tanzania",TZ,2005,261.29829359544
  "Tanzania",TZ,2004,253.419242726038
  "Tanzania",TZ,2003,243.296723767051
  "Tanzania",TZ,2002,228.811746537101
  "Tanzania",TZ,2001,216.922426795836
  "Tanzania",TZ,2000,210.684741275608
  "Tanzania",TZ,1999,200.318814874198
  "Tanzania",TZ,1998,183.200450831105
  "Tanzania",TZ,1997,145.428442213675
  "Tanzania",TZ,1996,122.675477189688
  "Tanzania",TZ,1995,104.691433669675
  "Tanzania",TZ,1994,84.2469921638871
  "Tanzania",TZ,1993,65.5915701164662
  "Tanzania",TZ,1992,53.9558061944451
  "Tanzania",TZ,1991,44.0168915468776
  "Tanzania",TZ,1990,35.4970513354335
  "Thailand",TH,2013,12.3364348606274
  "Thailand",TH,2012,12.1807343505954
  "Thailand",TH,2011,12.3703845015087
  