Year	constant 2010 US$
1980	608.084112448299
1981	524.942677373527
1982	509.216006659333
1983	499.695915467435
1984	483.18596389298
1985	468.262659541733
1986	474.565013371881
1987	440.251991935636
1988	433.729061215959
1989	421.487061447478
1990	437.144057700504
1991	384.166588948612
1992	386.327861777301
1993	386.444765318204
1994	372.204808853123
1995	361.576655946837
1996	370.091314534509
1997	375.072791685764
1998	386.529581558851
1999	391.119170459765
2000	398.635259792384
2001	430.877281641592
2002	377.643728697345
2003	397.960209024178
2004	410.95614112104
2005	373.926513416389
2006	379.026630870604
2007	378.197320987804
2008	393.690144938846
2009	367.135897161504
2010	381.799008898431
2011	382.028101928164
2012	394.672068272156
2013	387.366916099964
2014	392.312852760972
2015	385.680312142518
2016	392.992199905245