Year	constant 2010 US$
1975	1494114030.729
1976	1661814421.87447
1977	2133765046.9288
1978	2971232491.99358
1979	3065430801.47274
1980	3518729211.50531
1981	4858188398.01139
1982	4858188398.01139
1983	5407163747.25966
1984	5958694189.29435
1985	6697572346.94928
1986	6510040491.05846
1987	5767895587.8574
1988	4175956286.24286
1989	3486923660.43129
1990	3235865218.73787
1991	3116138238.05311
1992	2625803646.14398
1993	2438064833.99867
1994	2626868580.72201
1995	2375963931.33266
1996	2699724328.67786
1997	2951273617.81958
1998	3058379612.64264
1999	3145452760.06553
2000	3567967054.69626
2001	4150878996.62379
2002	4764493779.66863
2003	4354490597.04777
2004	4835379981.25849
2005	4694859155.57732
2006	4754637319.189
2007	4801454089.27607
2008	5883432026.36795
2009	5906744628.96805
2010	6135433302.97995
2011	6856814107.57405
2012	7043641569.60129
2013	7434680110.72922
2014	8400769274.49036
2015	8614010289.00905
2016	9025857094.33762
2017	9386053829.49071
2018	9602490719.36611