Year	constant 2010 US$
1970	4639.12495834282
1971	5055.50593240873
1972	5544.42076803298
1973	6150.85473716581
1974	6575.34315476635
1975	6718.5457577296
1976	7188.80836312918
1977	7331.43164315223
1978	7340.42175520946
1979	7627.25248129326
1980	8082.0338799935
1981	7479.00970246969
1982	7270.65228713498
1983	6791.84989549783
1984	6989.80606085702
1985	7431.13002741928
1986	7944.34130653172
1987	8130.45118999141
1988	7944.47451476351
1989	8828.34386079388
1990	7780.98635940914
1991	7786.39559217029
1992	7644.56405589403
1993	7827.71471198306
1994	8001.62598114677
1995	8413.51810799451
1996	8361.99195975065
1997	8468.91935088364
1998	8263.39817632683
1999	8117.59351973175
2000	8558.95067325974
2001	8529.22183614789
2002	8662.03327202277
2003	8668.59656497043
2004	9077.57558721234
2005	9266.75782510386
2006	9565.44182410923
2007	10080.5342711948
2008	10454.9568438381
2009	10360.3264841321
2010	10954.9056416934
2011	11321.7149413539
2012	11493.3453157524
2013	11847.6756205794
2014	11713.0989966148
2015	11183.3090220956
2016	10732.8822071172
2017	10785.8454294579
2018	10857.434111112