Year	current US$
1960	4290000
1961	7370000
1962	9900000
1963	6710000
1970	3968300000
1971	4441460000
1972	5862380000
1973	8485110000.000001
1974	11537540000
1975	13790540000
1976	15254090000
1977	16471590000
1978	17697900000
1979	19342380000
1980	21131950000
1981	17023040000
1982	11358740000
1983	11749860000
1984	11863070000
1985	12636437167
1986	12329276300
1987	11928112900
1988	13840460000
1989	11357228268
1990	8975983211
1991	17084332773.999998
1992	15203585100
1993	18834736000
1994	21569100000
1995	29049742000
1996	37136811000
1997	42317910000
1998	47054067000
1999	45911466200
2000	48828821436
2001	50153132066
2002	55334378519
2003	68373493602.99999
2004	89604256175
2005	101413000000
2006	127210000000
2007	166143000000
2008	209411000000
2009	149716000000
2010	178033000000
2011	210698000000
2012	199217000000
2013	207665000000
2014	223556000000
2015	196473000000
2016	199507000000
2017	233812000000
2018	268959000000
2019	265282000000
2020	257177000000