Year	constant 2015 US$
1976	3656080945.9362864
1977	3857962476.69123
1978	4378438826.455347
1979	5256256643.06739
1980	5905110847.843497
1981	7019837705.822122
1982	7343909799.656669
1983	7114675705.1132965
1984	7450074262.3213
1985	7519114973.391739
1986	8147682975.110912
1987	8257194661.279939
1988	8564293965.223518
1989	7396755358.619996
1990	7244845508.0619755
1991	7411564351.269694
1992	7665682844.578726
1993	8115867510.242233
1994	8439533834.977001
1995	9229072822.653526
1996	9638718851.307528
1997	9994978433.541784
1998	10377373367.199095
1999	10755237739.314573
2000	11335828813.104292
2001	11905533077.14355
2002	12411268089.126827
2003	12983508121.424505
2004	13867783654.99279
2005	15266145380.534847
2006	16254083547.082481
2007	17438020160.238873
2008	18373854237.58478
2009	19055701949.150116
2010	19700240807.73491
2011	20315748173.65181
2012	21219865411.737305
2013	21949167680.787544
2014	22597901519.151634
2015	23206526619.71831
2016	23808943665.425884
2017	24329128636.975792
2018	24947232987.469326
2019	25670170836.90194
2020	25140688740.89679
2021	26210639877.042324
2022	26766385851.039085
2023	27392407270.755474