Year	constant 2010 US$
1970	13026.6801856915
1971	13278.8284354381
1972	13486.8785331058
1973	13993.050995468
1974	14327.4794548771
1975	14627.2070383878
1976	15314.4280712522
1977	15851.4184869984
1978	16480.3411816328
1979	16575.8247268543
1980	16431.5241052626
1981	15929.8628174016
1982	15627.7120320625
1983	15764.5833536262
1984	15797.1345883256
1985	15942.1254858215
1986	16229.2963540227
1987	16461.4746082114
1988	16609.1829920246
1989	17030.8169751458
1990	17597.1799302913
1991	17931.8269401712
1992	17924.1070349836
1993	17943.9699127502
1994	18184.0970995824
1995	18576.6362379893
1996	19402.0499381616
1997	20108.5374272486
1998	21107.425535375
1999	22216.3916054245
2000	22866.2131662673
2001	23158.3279943057
2002	23278.7850864382
2003	23138.9919760212
2004	23233.955166662
2005	23390.6772633025
2006	23316.7470887678
2007	23702.2448275198
2008	23820.3098376896
2009	23251.3233019968
2010	23156.6717206406
2011	23064.9404721544
2012	22717.5234858425
2013	22432.2702666586
2014	22435.4679140761
2015	22777.8441670443
2016	22910.6220368636
2017	23260.9327138064
2018	23663.7318074676