Year	constant 2010 US$
1980	248302667.746695
1981	206793051.690354
1982	207189115.843863
1983	140757056.643595
1984	112737848.334134
1985	102528583.705382
1986	93507844.2229225
1987	100512476.45545
1988	110133769.773959
1989	128092914.265119
1990	134679927.808558
1991	172118758.828098
1992	195937410.138949
1993	203299560.501735
1994	269851351.557637
1995	286149585.132683
1996	394953452.318296
1997	429057756.411363
1998	470736058.158083
1999	467413241.770519
2000	614268582.561812
2001	924075981.197053
2002	1278203185.53671
2003	1520514935.58677
2004	1843661923.25504
2005	1959226462.45116
2006	2198927893.45649
2007	2549232643.42172
2008	2728630640.31621
2009	3151405230.3457
2010	3199622439.27433
2011	3748502720.44727
2012	4246488166.06379
2013	4338242819.34346
2014	5020008493.29608
2015	4959214067.52629
2016	5423927175.60156
2017	6799081457.49742
2018	7105039758.88144