Year	current US$
1987	602.213247995472
1988	670.5792881536635
1989	670.6656092701996
1990	751.5504547543853
1991	761.6760811971126
1992	828.2679173947328
1993	1119.6253861218688
1994	898.0171824619737
1995	1047.0265898084044
1996	1046.9786712919833
1997	1001.7598763465543
1998	1038.8284358362478
1999	1155.6685806560372
2000	1016.046144913842
2001	1050.3778622452066
2002	1124.958897458928
2003	1465.52225533755
2004	1640.293103938064
2005	1668.8581002585186
2006	1861.2793128428734
2007	2580.1626272808394
2008	2957.8853706506893
2009	2823.7282700919054
2010	2657.5614614919264
2011	2969.0054755261876
2012	2756.0748804903874
2013	2925.1920867510094
2014	2866.1974816376473
2015	2459.586567078433
2016	2538.88769466418
2017	2668.2895443877023
2018	2971.8724722372644
2019	2970.5049692975927
2020	2509.0549670690134
2021	2820.865788311349