Year	current US$
1971	912800.146157559
1972	1359176.03668198
1973	1365461.12365743
1974	1974767.74441989
1975	4126786.16220822
1976	3017494.04893514
1977	3790595.31222667
1978	4887732.15571675
1979	3874572.11688644
1980	4949578.99241048
1981	5180937.25671682
1982	5312500.63793342
1983	7606687.80292759
1984	8220240.047069031
1985	11197168.29931905
1986	14934756.31207478
1987	14438868.96026458
1988	22409805.35687726
1989	20418444.112589728
1990	19326683.86280451
1991	20617220.22763769
1992	20777549.71998079
1993	16773705.782923609
1994	19941717.09369158
2001	25112646.525119342
2002	25090650.08473659
2003	33059086.080671404
2004	27688100.51089652
2005	33791496.63701343
2006	28530415.21503781
2007	35353034.65155
2008	40888314.767436914
2009	43948426.486892
2010	44246445.564303204
2011	49520715.47313049
2012	74251170.1439865
2013	85688586.50138992
2014	63221062.01800543
2015	51942709.58158948
2016	70591776.50721715
2017	90439842.68920277
2018	98833732.27454396
2019	105187161.27749424
2020	99386286.9247072
2021	77648239.29053985
2022	106543539.11203495