Year	constant 2010 US$
1971	3833.94280596336
1972	3938.71644577572
1973	4064.96797307889
1974	3919.57938764643
1975	3974.45235306302
1976	4343.87096302388
1977	4902.42321276037
1978	4924.31285823377
1979	4788.52099268091
1980	4703.53185486185
1981	3756.11655064689
1982	3221.26900553124
1983	3764.85489165851
1984	4188.59703627841
1985	4242.73867819697
1986	4666.4912750894
1987	4427.63861805686
1988	4411.35486843616
1989	4424.41697313859
1990	4517.28394280002
1991	4468.06546824079
1992	4824.93554871778
1993	5078.47411094479
1994	5312.13767991608
1995	5345.9908410971
1996	5242.33045286297
1997	5523.58160199758
1998	5810.55136540963
1999	5669.55464329336
2000	5674.59625523695
2001	5767.3631708733
2002	5768.92556752844
2003	5846.47299727918
2004	5926.04628693263
2005	6021.60969359231
2006	6347.73678976652
2007	6752.41064685617
2008	6935.68570593635
2009	6830.76316833891
2010	7299.73255906445
2011	7432.94775879461
2012	7743.89232413027
2013	7807.89464750992
2014	7992.01721800861
2015	8389.6300503531
2016	8754.28797512648
2017	8713.05186653905