anchor.diff:  "Macao SAR, China",MO,2013,4.64387083053589
   "Macao SAR, China",MO,2012,4.56529092788696
   "Macao SAR, China",MO,2011,4.43978691101074
  -"Macao SAR, China",MO,2010,4.21652978917782
  -"Macao SAR, China",MO,2009,4.07108995283568
  -"Macao SAR, China",MO,2008,4.0664709275106
  -"Macao SAR, China",MO,2007,3.76560684489151
  -"Macao SAR, China",MO,2006,3.55331708408173
  -"Macao SAR, China",MO,2005,3.39578280061246
  -"Macao SAR, China",MO,2004,3.31692917947138
  -"Macao SAR, China",MO,2003,3.34210993759374
  -"Macao SAR, China",MO,2002,3.40142881177808
  -"Macao SAR, China",MO,2001,3.50149738400372
  -"Macao SAR, China",MO,2000,3.62918500866789
  -"Macao SAR, China",MO,1999,3.77326627386514
  -"Macao SAR, China",MO,1998,3.87606890724816
  -"Macao SAR, China",MO,1997,3.9989246811004
  -"Macao SAR, China",MO,1996,4.00212962026745
  -"Macao SAR, China",MO,1995,3.98694152164697
  -"Macao SAR, China",MO,1994,3.76233380604903
  -"Macao SAR, China",MO,1993,3.59999033694251
  -"Macao SAR, China",MO,1992,3.36400727291502
  -"Macao SAR, China",MO,1991,2.99626443969491
  -"Macao SAR, China",MO,1990,2.77467076643271
  -"Hong Kong SAR, China",HK,2019,6.10781735823891
  -"Hong Kong SAR, China",HK,2018,6.08314962602672
  +"Macao SAR, China",MO,2010,4.2166678954621
  +"Macao SAR, China",MO,2009,4.07079270834506
  +"Macao SAR, China",MO,2008,4.06433833733784
  +"Macao SAR, China",MO,2007,3.76421878897499
  +"Macao SAR, China",MO,2006,3.55394076145482
  +"Macao SAR, China",MO,2005,3.39829838821081
  +"Macao SAR, China",MO,2004,3.31933675326617
  +"Macao SAR, China",MO,2003,3.34404071272218
  +"Macao SAR, China",MO,2002,3.40440924031022
  +"Macao SAR, China",MO,2001,3.50515408105085
  +"Macao SAR, China",MO,2000,3.63580653401955
  +"Macao SAR, China",MO,1999,3.78315125466945
  +"Macao SAR, China",MO,1998,3.88401120582518
  +"Macao SAR, China",MO,1997,4.00547073180818
  +"Macao SAR, China",MO,1996,4.00799663478596
  +"Macao SAR, China",MO,1995,3.99091962430039
  +"Macao SAR, China",MO,1994,3.76637822705768
  +"Macao SAR, China",MO,1993,3.60343358549527
  +"Macao SAR, China",MO,1992,3.36765936034694
  +"Macao SAR, China",MO,1991,3.00193735420132
  +"Macao SAR, China",MO,1990,2.77957872940926
  +"Hong Kong SAR, China",HK,2020,6.06613103645133
  +"Hong Kong SAR, China",HK,2019,6.10086307920038
  +"Hong Kong SAR, China",HK,2018,6.08519985884958
   "Hong Kong SAR, China",HK,2017,6.01143312454224
   "Hong Kong SAR, China",HK,2016,5.93228912353516
   "Hong Kong SAR, China",HK,2015,5.83105325698853
  
positive.code: "Iceland",IS,1992,71.519962
  "Iceland",IS,1991,70.710816
  "Iceland",IS,1990,67.458914
  "Liberia",LR,2019,0.417096855708647
  "Liberia",LR,2018,0.441692045488902
  "Liberia",LR,2017,0.460993551184097
  "Liberia",LR,2016,0.518197656292429
  "Liberia",LR,2015,0.549791635347342
  
negative.code: "Lao PDR",LA,2013,2712.92993164063
  "Lao PDR",LA,2012,2615.5234375
  "Lao PDR",LA,2011,2666.53491210938
  "Lao PDR",LA,2010,2464.25985545446
  "Lao PDR",LA,2009,2283.0155117707
  "Lao PDR",LA,2008,2369.90751114538
  "Lao PDR",LA,2007,2219.29887333339
  "Lao PDR",LA,2006,2121.13904235099
  "Lao PDR",LA,2005,1972.227836366
  "Lao PDR",LA,2004,1871.92153892413
  "Lao PDR",LA,2003,1736.66112136793
  "Lao PDR",LA,2002,1559.1989166258
  "Lao PDR",LA,2001,1489.73346455599
  "Lao PDR",LA,2000,1398.39863310981
  "Lao PDR",LA,1999,1145.58088733921
  "Lao PDR",LA,1998,509.760321727268
  "Lao PDR",LA,1997,279.395837471359
  "Lao PDR",LA,1996,238.129037872625
  "Lao PDR",LA,1995,213.223830666101
  "Lao PDR",LA,1994,181.889219031789
  "Lao PDR",LA,1993,172.490450828471
  "Lao PDR",LA,1992,158.817356191157
  "Lao PDR",LA,1991,153.251034165733
  "Lao PDR",LA,1990,140.241781810875
  "Kosovo",XK,2020,0.330934498216809
  "Kosovo",XK,2019,0.331705759533643
  "Kosovo",XK,2018,0.335476106793921
  "Kosovo",XK,2017,0.340077292914052
  "Kosovo",XK,2016,0.339377717152794
  "Kosovo",XK,2015,0.339128029539666
  