Year	current US$
1960	93700000
1961	97200000
1962	102300000
1963	105800000
1964	79400000
1965	97100000
1966	106900000
1968	113300000
1970	51690000
1981	78371700
1982	50808440.62
1983	52066084.55
1984	49088515.20999999
1985	27370821.59
1986	11014416.020000001
1987	13302277.569999998
1988	23864421.26
1989	51872362.79
1990	56015457.54
1991	61933482.089999996
1992	751153328.5
1993	981386995.3
1994	1151535194
1995	1573460945
1996	1632033936
1997	1116440000
1998	1128860000
1999	1242970000
2000	1412482239
2001	1455357838
2002	1604539876
2003	1656544911
2004	2032824789
2005	2546457149
2006	2979106622
2007	3552148948
2008	4422746747
2009	3899895952
2010	4890032506
2011	6139995656
2012	7065582846
2013	9222976822
2014	10261616667
2015	11215140868
2016	12900202474
2017	14800881639
2018	18130580507
2019	21058389640
2020	20298153136