Year	constant 2010 US$
1970	18230.7226491344
1971	18629.203092253
1972	19930.4547580492
1973	21194.9641903437
1974	21769.9805285242
1975	22009.2277862992
1976	21992.2381086684
1977	21916.8696849118
1978	22498.581796202
1979	24090.5744473146
1980	25315.7598385249
1981	25406.5387478937
1982	25972.3055755763
1983	26624.5677810289
1984	27371.0897077533
1985	28295.8356646659
1986	29052.0055160823
1987	29984.8934923434
1988	31514.7139338403
1989	32685.5748552683
1990	32617.8297764796
1991	30272.6251363973
1992	28791.8119495936
1993	28268.2908786236
1994	29592.0753760114
1995	30981.8231062059
1996	32259.5509297368
1997	34458.4427556539
1998	36053.7839646168
1999	37958.0608868632
2000	40183.1807590605
2001	41382.2904499804
2002	42125.7964198993
2003	42464.7713258179
2004	44600.3098954217
2005	45547.6155350482
2006	47459.4108973806
2007	49396.1179490303
2008	49455.9068415239
2009	45646.5797992082
2010	46828.4072656665
2011	47383.1773351172
2012	46516.3741778784
2013	45870.8112583199
2014	45649.2366814476
2015	45765.4272465413
2016	47083.3568566913
2017	47758.4015947434
2018	48480.4149339074