Year	constant 2010 US$
1981	842.320538476962
1982	807.754322130327
1983	742.705183868834
1984	748.1492756245
1985	750.253377932658
1986	720.995368091667
1987	706.587849613368
1988	718.512722207413
1989	698.873276393475
1990	727.784583631988
1991	727.61133877266
1992	735.477771887206
1993	711.363743942189
1994	687.992699588109
1995	706.25706897496
1996	744.499585734604
1997	738.679830907501
1998	736.588466836761
1999	718.78676980569
2000	716.369266298098
2001	811.082822280374
2002	843.16587215295
2003	870.500362413336
2004	881.574039963705
2005	927.094113304435
2006	910.464316599795
2007	1005.48387053802
2008	949.022772177253
2009	991.800916641972
2010	1006.24718051923
2011	998.465187251104
2012	1003.35983239563
2013	1067.56261821437
2014	1063.65479757737
2015	1061.8259665409
2016	1037.24592548207
2017	1032.31531510672