Year	constant 2015 US$
1991	952.5169498230766
1992	917.9432128257903
1993	891.0973036877921
1994	940.5948151222956
1995	920.755194091776
1996	949.3561185043342
1997	976.7048160826016
1998	974.9273273308982
1999	989.2582764763813
2000	1018.1899550060234
2001	1043.8996264192403
2002	1053.2726686418084
2003	1071.0282026339385
2004	1108.1893189694786
2005	1135.863218261081
2006	1173.570936915006
2007	1187.1814846393702
2008	1256.1319508618103
2009	1290.452185924883
2010	1311.143940269893
2011	1365.0680788424063
2012	1435.3060677409514
2013	1451.9170531785262
2014	1516.3195790644745
2015	1528.6317739459405
2016	1502.6394564366915
2017	1559.7233749415525
2018	1580.3526561493625
2019	1640.956185465534
2020	1701.179312735716
2021	1681.020389869124
2022	1652.4993378257698