Year	current US$
1977	24281503.68
1978	23602317.81
1979	24005556.11
1980	40064800.26
1981	31596889.5
1982	25852012.63
1983	20547992.71
1984	20617847.44
1985	20757017.14
1986	27560075.76
1987	36425994.87
1988	42742012.02
1989	47700454.71
1990	59140384.67
1991	62366531.37
1992	76012992.86
1993	76491363.53
1994	85453643.8
1995	105860860.513533
1996	100349713.287571
1997	76416556.3624656
1998	73741557.0460778
1999	79715583.7524235
2000	89761166.1532951
2001	80954171.1337339
2002	85021681.6857538
2003	108444935.563724
2004	113427832.59142
2005	136692598.596987
2006	136573208.356251
2007	138793676.267285
2008	155035990.797435
2009	135620281.024167
2010	130909874.536165
2011	176875019.612974
2012	176969700.272847
2013	175918335.416559
2014	196981864.56991
2015	200903517.81206
2016	211373829.22032
2017	216552201.969857
2018	234507466.969779
2019	215024389.588415
2020	234138375.784112
2021	314508173.969034
2022	313360799.946552
2023	316716217.041016