Year	current US$
1984	31628570.5028572
1985	42599999.0800001
1986	31983156.7389473
1987	19570915.866535
1988	10781302.8473618
1989	12852842.7796883
1990	15580077.4109502
1991	18505583.5015953
1992	20300525.0030723
1993	25387230.1011585
1994	29479904.5329034
1995	33393145.7931626
1996	39200039.123146
1997	32387068.5125955
1998	16994712.9859956
1999	16227882.2701644
2000	14943674.5097867
2001	18525921.4012165
2002	19987819.9502834
2003	25211417.9086189
2004	33133212.5502787
2005	28033121.7308501
2006	36114866.3111115
2007	47384777.5630116
2008	63274872.1445067
2009	72322515.3783363
2010	99572212.0012568
2011	121495584.358428
2012	134869305.276424
2013	330972126.600168
2014	331699412.944529
2015	360220055.743422
2016	397943078.376873
2017	422553504.603334
2018	453538621.449943
2019	461383029.537771
2020	466545103.00523
2021	462266362.311754