anchor.diff:  "Togo",TG,1992,134.570094065145
   "Togo",TG,1991,133.311160866677
   "Togo",TG,1990,134.164774628432
  -"Tonga",TO,2014,1.45267751454079
  -"Tonga",TO,2013,1.44354054257438
  -"Tonga",TO,2012,1.46205230958769
  +"Tonga",TO,2015,1.43982851553403
  +"Tonga",TO,2014,1.43365795732339
  +"Tonga",TO,2013,1.44393850018722
  +"Tonga",TO,2012,1.46077944167922
   "Tonga",TO,2011,1.45268475139735
  -"Tonga",TO,2010,1.3975715617848
  -"Tonga",TO,2009,1.36658042216235
  -"Tonga",TO,2008,1.40659107554249
  -"Tonga",TO,2007,1.31390096376889
  -"Tonga",TO,2006,1.27158093526821
  -"Tonga",TO,2005,1.11721935469177
  -"Tonga",TO,2004,1.08527194047825
  -"Tonga",TO,2003,1.07529639852782
  -"Tonga",TO,2002,1.00312092083049
  -"Tonga",TO,2001,0.936237291373987
  -"Tonga",TO,2000,0.927632855244864
  -"Tonga",TO,1999,0.920402066407381
  -"Tonga",TO,1998,0.877909344368206
  -"Tonga",TO,1997,0.867971479273223
  -"Tonga",TO,1996,0.889713576820241
  -"Tonga",TO,1995,0.862210464450448
  -"Tonga",TO,1994,0.907212327799176
  -"Tonga",TO,1993,0.728554071171391
  -"Tonga",TO,1992,0.745397966591368
  -"Tonga",TO,1991,0.709546274258183
  -"Tonga",TO,1990,0.669792468326649
  -"Trinidad and Tobago",TT,2015,3.99981615341185
  -"Trinidad and Tobago",TT,2014,4.25840036889873
  -"Trinidad and Tobago",TT,2013,4.14089263250512
  -"Trinidad and Tobago",TT,2012,3.85338132824931
  +"Tonga",TO,2010,1.40136105414527
  +"Tonga",TO,2009,1.36809150087488
  +"Tonga",TO,2008,1.41163569452379
  +"Tonga",TO,2007,1.3427835708796
  +"Tonga",TO,2006,1.29866887092824
  +"Tonga",TO,2005,1.1418353990522
  +"Tonga",TO,2004,1.10539372237407
  +"Tonga",TO,2003,1.07266380953482
  +"Tonga",TO,2002,1.00067455604885
  +"Tonga",TO,2001,0.93576431558495
  +"Tonga",TO,2000,0.927164226313194
  +"Tonga",TO,1999,0.919937090383033
  +"Tonga",TO,1998,0.87746583515459
  +"Tonga",TO,1997,0.86753299054921
  +"Tonga",TO,1996,0.889264104250744
  +"Tonga",TO,1995,0.861774886121646
  +"Tonga",TO,1994,0.906754015071711
  +"Tonga",TO,1993,0.728186014440643
  +"Tonga",TO,1992,0.745021400527783
  +"Tonga",TO,1991,0.709187820037211
  +"Tonga",TO,1990,0.669454097249021
  +"Trinidad and Tobago",TT,2015,3.31652640121454
  +"Trinidad and Tobago",TT,2014,3.72138278720328
  +"Trinidad and Tobago",TT,2013,3.82352816436618
  +"Trinidad and Tobago",TT,2012,3.86861564378242
   "Trinidad and Tobago",TT,2011,3.93782384551744
  -"Trinidad and Tobago",TT,2010,3.44585732029347
  -"Trinidad and Tobago",TT,2009,3.15100223484866
  -"Trinidad and Tobago",TT,2008,4.38724390261774
  -"Trinidad and Tobago",TT,2007,3.61350399927612
  -"Trinidad and Tobago",TT,2006,3.29011966385032
  -"Trinidad and Tobago",TT,2005,3.33355660624703
  -"Trinidad and Tobago",TT,2004,3.03633682517464
  -"Trinidad and Tobago",TT,2003,2.86525839487581
  -"Trinidad and Tobago",TT,2002,2.64522285933094
  -"Trinidad and Tobago",TT,2001,2.83293127020059
  -"Trinidad and Tobago",TT,2000,2.81873693487675
  -"Trinidad and Tobago",TT,1999,2.58885330191169
  -"Trinidad and Tobago",TT,1998,2.52002396850524
  -"Trinidad and Tobago",TT,1997,2.59535016903983
  -"Trinidad and Tobago",TT,1996,2.74095004746914
  -"Trinidad and Tobago",TT,1995,2.73793189515985
  -"Trinidad and Tobago",TT,1994,2.68693466991964
  -"Trinidad and Tobago",TT,1993,2.37692507209886
  -"Trinidad and Tobago",TT,1992,2.21100622438368
  -"Trinidad and Tobago",TT,1991,2.17604814754384
  -"Trinidad and Tobago",TT,1990,2.2487818859761
  -"Tunisia",TN,2015,0.666505481687928
  -"Tunisia",TN,2014,0.649921341489662
  -"Tunisia",TN,2013,0.628423140506829
  -"Tunisia",TN,2012,0.611652753357359
  +"Trinidad and Tobago",TT,2010,3.47285539014339
  +"Trinidad and Tobago",TT,2009,3.11822111269217
  +"Trinidad and Tobago",TT,2008,4.34160166958107
  +"Trinidad and Tobago",TT,2007,3.57591128850078
  +"Trinidad and Tobago",TT,2006,3.2558912476955
  +"Trinidad and Tobago",TT,2005,3.2988762962377
  +"Trinidad and Tobago",TT,2004,3.00474861402138
  +"Trinidad and Tobago",TT,2003,2.83544997979419
  +"Trinidad and Tobago",TT,2002,2.6177035600033
  +"Trinidad and Tobago",TT,2001,2.8034591660547
  +"Trinidad and Tobago",TT,2000,2.78941250001369
  +"Trinidad and Tobago",TT,1999,2.56192043656997
  +"Trinidad and Tobago",TT,1998,2.4938071638195
  +"Trinidad and Tobago",TT,1997,2.5683497122319
  +"Trinidad and Tobago",TT,1996,2.71243486236048
  +"Trinidad and Tobago",TT,1995,2.70944810502631
  +"Trinidad and Tobago",TT,1994,2.65898142613359
  +"Trinidad and Tobago",TT,1993,2.35219698073683
  +"Trinidad and Tobago",TT,1992,2.1880042523988
  +"Trinidad and Tobago",TT,1991,2.15340985825476
  +"Trinidad and Tobago",TT,1990,2.22538691884717
  +"Tunisia",TN,2015,0.653866765945045
  +"Tunisia",TN,2014,0.639295093041327
  +"Tunisia",TN,2013,0.622484480716764
  +"Tunisia",TN,2012,0.609902057011989
   "Tunisia",TN,2011,0.592142375780858
  -"Tunisia",TN,2010,0.576808511310971
  -"Tunisia",TN,2009,0.562395633992908
  -"Tunisia",TN,2008,0.549985000266383
  -"Tunisia",TN,2007,0.527308659109533
  -"Tunisia",TN,2006,0.530170034665116
  -"Tunisia",TN,2005,0.526264775307612
  -"Tunisia",TN,2004,0.521425543598074
  -"Tunisia",TN,2003,0.518389066127222
  -"Tunisia",TN,2002,0.514903902311323
  -"Tunisia",TN,2001,0.511128541515946
  -"Tunisia",TN,2000,0.503084198420556
  -"Tunisia",TN,1999,0.498175193905724
  -"Tunisia",TN,1998,0.48934978176373
  -"Tunisia",TN,1997,0.478989496754354
  -"Tunisia",TN,1996,0.42688804603309
  -"Tunisia",TN,1995,0.416534397124566
  -"Tunisia",TN,1994,0.403623670086541
  -"Tunisia",TN,1993,0.394364168679732
  -"Tunisia",TN,1992,0.385654735673874
  -"Tunisia",TN,1991,0.373204811105702
  -"Tunisia",TN,1990,0.360275133899147
  +"Tunisia",TN,2010,0.579566460133271
  +"Tunisia",TN,2009,0.565084669168399
  +"Tunisia",TN,2008,0.552614695310792
  +"Tunisia",TN,2007,0.529829929629752
  +"Tunisia",TN,2006,0.532704986549582
  +"Tunisia",TN,2005,0.528781054607962
  +"Tunisia",TN,2004,0.523918684624401
  +"Tunisia",TN,2003,0.520867688558035
  +"Tunisia",TN,2002,0.517365860800371
  +"Tunisia",TN,2001,0.513572448517099
  +"Tunisia",TN,2000,0.505489642246963
  +"Tunisia",TN,1999,0.500557165846826
  +"Tunisia",TN,1998,0.491689555931141
  +"Tunisia",TN,1997,0.481279734315976
  +"Tunisia",TN,1996,0.428929166024775
  +"Tunisia",TN,1995,0.418526012240277
  +"Tunisia",TN,1994,0.405553553927952
  +"Tunisia",TN,1993,0.396249779195596
  +"Tunisia",TN,1992,0.387498702958006
  +"Tunisia",TN,1991,0.374989250393753
  +"Tunisia",TN,1990,0.361997751304675
   "Turkey",TR,2015,1.265847
   "Turkey",TR,2014,1.162952
   "Turkey",TR,2013,1.079759
  
positive.code: "Suriname",SR,1992,0.00200457273729654
  "Suriname",SR,1991,0.00151142485002502
  "Suriname",SR,1990,0.0013903460852803
  "Swaziland",SZ,2015,4.77672059739148
  "Swaziland",SZ,2014,4.53433206233841
  "Swaziland",SZ,2013,4.34305150629077
  "Swaziland",SZ,2012,4.16064484132541
  "Swaziland",SZ,2011,3.90048627706986
  "Swaziland",SZ,2010,2.8910238531389
  "Swaziland",SZ,2009,3.06992500922945
  "Swaziland",SZ,2008,2.93210844274218
  "Swaziland",SZ,2007,2.63957150312551
  "Swaziland",SZ,2006,2.60227184818401
  "Swaziland",SZ,2005,2.28096375998773
  "Swaziland",SZ,2004,2.2954121846712
  "Swaziland",SZ,2003,2.1769938986948
  "Swaziland",SZ,2002,2.08869649495515
  "Swaziland",SZ,2001,1.9430774543968
  "Swaziland",SZ,2000,1.83092347199125
  "Swaziland",SZ,1999,1.70329778018071
  "Swaziland",SZ,1998,1.64122876023881
  "Swaziland",SZ,1997,1.5446543472792
  "Swaziland",SZ,1996,1.41101388109111
  "Swaziland",SZ,1995,1.33426925957183
  "Swaziland",SZ,1994,1.16768541134849
  "Swaziland",SZ,1993,1.07464244838635
  "Swaziland",SZ,1992,0.937229109206329
  "Swaziland",SZ,1991,0.862135815230761
  "Swaziland",SZ,1990,0.818946994908995
  "Sweden",SE,2015,9.134865
  "Sweden",SE,2014,8.920972
  "Sweden",SE,2013,8.713239
  
negative.code: "Algeria",DZ,1992,5.75061694698754
  "Algeria",DZ,1991,4.82399130970275
  "Algeria",DZ,1990,3.24117545524009
  "Angola",AO,2015,66.6638094620496
  "Angola",AO,2014,70.2015083897171
  "Angola",AO,2013,72.4507292463504
  "Angola",AO,2012,71.8218694255595
  "Angola",AO,2011,68.3148555611226
  "Angola",AO,2010,56.1543917660417
  