Year	current US$
1970	8800000
1971	14100000
1972	19500000
1973	24600000
1974	24600000
1975	30300000
1976	37600000
1977	45300000
1978	57100000
1979	83700000
1980	97400000
1981	93100000
1982	97200000
1983	84100000
1984	86200000
1985	94200000
1986	98628153.66
1987	94800000
1988	123705893.5
1989	164744363.70000002
1990	186456557.2
1991	172366582.3
1992	192309413.9
1993	238442932
1994	206255779.20000002
1995	240390491.20000002
1996	380281256.90000004
1997	336011256.4
1998	383034318.7
1999	433535586.7
2000	338614970
2001	471378374
2002	415616012
2003	369761776
2004	497587757
2005	650627549
2006	729068769
2007	860368963
2008	1598767656
2009	936978273
2010	1180307255
2011	1720951105
2012	1279816358
2013	924711414
2014	1075346813
2015	983737859
2016	1647989733
2017	1348462670
2018	1136551359
2019	1437735998
2020	1311269536