Year	current US$
1975	108000000
1976	103000000
1977	114000000
1978	147000000
1979	27000000
1980	152000000
1981	154000000
1982	168000000
1983	19000000
1984	5000000
1985	6000000
1986	10000000
1987	10000000
1988	7000000
1989	9000000
1990	11000000
1991	21000000
1992	34000000
1993	198000000
1994	250000000
1995	336000000
1996	396000000
1997	361000000
1998	359000000
1999	308000000
2000	338325000
2001	344833000
2002	329421000
2003	295980000
2004	339493000
2005	373953000
2006	529306000
2007	562634000
2008	813083000
2009	730896100
2010	1023656774.64
2011	1123817121.58
2012	1063670886.79
2013	1150189008.34
2014	1538775897.25
2015	1339086890.17
2016	1385076006.47
2017	2238140844.16
2018	2253247430.04
2019	2231583198.17
2020	1607787352.21
2021	1755081763.44
2022	2238383172.35
2023	2286426744.26