Year	constant 2010 US$
1970	19005.2042252828
1971	19357.8081941407
1972	20488.5046256665
1973	21526.6018714607
1974	22134.2353126518
1975	22351.3012281253
1976	23318.1747055512
1977	23470.272026178
1978	23863.0812230014
1979	23894.9027400076
1980	23984.6176173539
1981	24521.5532630638
1982	23538.5743429989
1983	24108.7915302682
1984	25143.4035312611
1985	26165.0573069989
1986	26396.1951227423
1987	27371.0508444787
1988	28284.1772504738
1989	28487.886988112
1990	27768.1940673816
1991	26997.4616948228
1992	26625.8241334978
1993	26970.5612755119
1994	27844.858662083
1995	28691.21580775
1996	28878.0032524908
1997	29854.1966476217
1998	30130.929342006
1999	31703.2283465577
2000	33732.7516630125
2001	33596.6265414192
2002	34295.800131805
2003	35249.4078085489
2004	36551.1005031639
2005	38078.5817882624
2006	38678.1469804663
2007	39560.3166766428
2008	39881.3174481443
2009	36954.7362496112
2010	38427.3680313043
2011	39630.7904266249
2012	39849.2109403994
2013	40413.6843849821
2014	40981.4948784203
2015	39805.9643756833
2016	39684.1480779209
2017	41191.0130826266