Year	current US$
1960	217030000
1961	220180000
1968	1334150000
1969	1553450000
1970	1726310000
1971	1848000000
1972	2403000000
1973	3351840000
1974	3942550000
1975	4519510000
1976	4926920000
1977	5825290000
1978	6352220000
1979	7931220000
1980	8649560000
1981	8732440000
1982	8790920000
1983	8702090000
1984	8564740000
1985	8542680000
1986	9157760000
1987	9555650000
1988	9943930000
1989	9682232459
1990	9592720868
1991	9971600000
1992	10728000000
1993	8597700000
1994	10587600000
1995	12861400000
1996	13144659000
1997	19099940000
1998	23005465000
1999	24848994000
2000	28023117556
2001	30420111194
2002	34475816229
2003	43167480368
2004	55566815777
2005	62809033071
2006	75371526902
2007	95572266430
2008	108770000000
2009	83195173020
2010	95488886240
2011	112298000000
2012	103602000000
2013	107503000000
2014	110622000000
2015	98524257715
2016	101919000000
2017	113806000000
2018	124704000000
2019	123797000000
2020	120311000000