Year	current US$
1977	97956095.73335671
1978	117885094.5204885
1979	117209535.23956911
1980	136800869.9076119
1981	135449292.6843
1982	133759833.995129
1983	124639845.2715419
1984	121599848.8400386
1985	62826588.4824676
1986	82119038.3470623
1987	76086937.82935339
1988	87484104.50564429
1989	79772589.74837789
1990	82986910.1564859
1991	72668123.3877791
1992	67837941.62585649
1993	30883442.0038206
1994	22964207.8928602
1995	19849576.8312839
1996	16483525.19321799
1997	16707672.237929
1998	31224974.73998462
1999	50020399.63416232
2000	119000000
2001	134000000
2002	275000000
2003	329000000
2004	351000000
2005	419000000
2006	385000000
2007	108500000
2008	207700000
2009	385000000
2010	410100000
2011	40200000
2012	152200000
2013	179900000
2014	79200000
2015	483000000
2016	85500000
2017	107000000
2018	133700000
2019	252600000
2020	200500000
2021	82100000