Year	current US$
1970	5539999.999105933
1971	6599999.917671081
1972	7449999.919161195
1973	9899999.912828207
1974	10030000.025406484
1975	16800000.15534459
1976	18910000.063478947
1977	14939999.965950852
1978	15919999.854639184
1979	19580000.085756175
1980	28890000.05461275
1981	37880000.14424324
1982	33399999.767541897
1983	31479999.87751243
1984	33379999.935626972
1985	38220000.01370907
1986	42329999.98144805
1987	39349999.40544368
1988	49619999.775663026
1989	53919999.70190227
1990	39900000.00409783
1991	35950000.224635005
1992	37750000.19557773
1993	32510000.12457372
1994	23519999.837502833
1995	19380000.166594986
1996	18459999.84815719
1997	21869999.9898672
1998	17090000.124648217
1999	18379999.818280343
2000	12520000.167191029
2001	12390000.075101864
2002	11129999.903962012
2003	13430000.111460675
2004	23459999.55385924
2005	17920000.10609627
2006	19150000.035762787
2007	23249999.91059303
2008	26259999.990463246
2009	26809999.734163277
2010	25400000.393390663
2011	18550000.019371502
2012	17791969.50979532
2013	16877751.09335779
2014	20980147.123336792
2015	14948623.617179696
2016	16093343.60808133
2017	16304956.16793632
2018	14718171.797692772
2019	20285698.29463958
2020	24219305.11295795
2021	30812715.590000145
2022	32789161.324501056