Year	constant 2015 US$
1991	2090.187709239196
1992	1949.91957610196
1993	1958.3061009466576
1994	1863.9634830814998
1995	1843.0426769411542
1996	1839.0705105196234
1997	1785.7695628160338
1998	1764.4626613488908
1999	1695.2990128474369
2000	1641.9113971445106
2001	1602.2148103426937
2002	1547.288597075831
2003	1697.3638661707344
2004	1572.9818283704028
2005	1724.243258511505
2006	1655.57632695909
2007	1771.8507627578908
2008	1611.9274107452254
2009	1603.2684343962487
2010	1595.5904592490906
2011	1558.2350585638349
2012	1501.4557615630797
2013	1538.6170139037158
2014	1437.768786402728
2015	1361.063459203664
2016	1362.96790749452
2017	1363.7503115058978
2018	1368.7201067266772
2019	1373.215643708804
2020	1307.9694075096681
2021	1232.6777033684975
2022	1162.5538718810249