Year	constant 2010 US$
1970	42137.5189947395
1971	41883.1412123491
1972	43051.2231750558
1973	44201.7280770732
1974	44648.3822216412
1975	43158.00760544
1976	43079.8158044325
1977	42958.8938568115
1978	42339.3340715661
1979	41041.8667765521
1980	40495.698015877
1981	38896.6259416659
1982	37756.4209028065
1983	36776.5149572427
1984	35820.9317453704
1985	35095.9925402225
1986	34744.3924512447
1987	35204.9894579815
1988	35546.6495470777
1989	35831.6208246801
1990	35780.5196725988
1991	35291.7114092924
1992	34278.6471002551
1993	32766.0596707401
1994	32633.8251274783
1995	32917.6488213571
1996	34175.2600684125
1997	37293.2824132908
1998	38595.7232096964
1999	40035.4824490851
2000	40801.5421300322
2001	41420.8461776969
2002	42396.3023980284
2003	45519.4923839434
2004	47032.8668884706
2005	48831.9293599384
2006	49707.17301531
2007	48710.0755019137
2008	43900.4282124681
2009	41979.3688806202
2010	39736.3540626699
2011	38207.5959074045
2012	38192.4398900703
2013	39111.0795278003
2014	40790.198010639
2015	41767.5265081665
2016	42949.6662371557
2017	43858.0775135619
2018	44569.7830090145