Year	constant 2010 US$
1976	3863335841.47436
1977	4585643010.61284
1978	5485074054.07262
1979	6751755023.31475
1980	7265862212.55436
1981	7452111555.43367
1982	8315112527.12348
1983	8542328608.63617
1984	9377237023.13913
1985	9921585536.28876
1986	9321580437.32307
1987	9872448926.21194
1988	9439909646.05186
1989	9029071255.21724
1990	8196387780.48414
1991	7097488248.69605
1992	9087383283.39089
1993	8983925301.10762
1994	9164491635.20754
1995	9156101985.7933
1996	9913753136.41698
1997	10472112807.3906
1998	11211745910.623
1999	11495528283.9275
2000	13133883459.3531
2001	13811320333.3994
2002	13671455381.0078
2003	13798061540.5039
2004	15257319834.8247
2005	17472664298.2811
2006	18436540548.9125
2007	20219767181.4425
2008	21908830816.4947
2009	21305889966.4496
2010	19565867418.8999
2011	21004041159.8465
2012	23106012576.1859
2013	25157244102.4204
2014	24962756406.3304
2015	25976868453.1686
2016	26037925867.6562
2017	27066001929.1103
2018	26739463751.6466