Year	current US$
1990	52059575.4186997
1991	71828450.9417907
1992	67393170.2801276
1993	83144404.648292
1994	94694261.288571
1995	114688223.327305
1996	131369647.35171
1997	135778913.587817
1998	132639983.644744
1999	132898918.045043
2000	133118600.00622
2001	130708422.876549
2002	133625087.771026
2003	146238176.884958
2004	165829666.300631
2005	204438546.284409
2006	227246452.083191
2007	256985964.525161
2008	333783778.163205
2009	372874590.358783
2010	533818701.764026
2011	633380331.851973
2012	720272838.497282
2013	784276066.595997
2014	809847597.335694
2015	831650454.752578
2016	868241494.233421
2017	907700279.083586
2018	957921458.423848
2019	1020104303.99098
2020	1077225484.60755
2021	1149612357.62261