Year	constant 2010 US$
1977	155052568.818079
1978	168972640.600331
1979	174949406.28816
1980	178103106.862028
1981	176256488.704927
1982	185935818.088519
1983	196716625.621575
1984	204616364.102757
1985	217684199.596004
1986	240413383.726808
1987	254811150.284036
1988	257478811.284867
1989	266005253.881242
1990	281668445.570935
1991	287154646.317822
1992	288684791.967852
1993	288147419.875567
1994	295296298.002523
1995	299089168.529147
1996	310025597.072149
1997	321847619.406718
1998	363367399.312975
1999	388208427.93819
2000	407401422.554374
2001	413129176.374217
2002	427779410.415872
2003	457867418.560406
2004	463868626.063948
2005	488681990.114158
2006	492848045.935851
2007	538117439.777343
2008	553899916.121736
2009	536106069.663587
2010	527111481.481481
2011	534698000.089353
2012	537997450.82185
2013	544959020.13254
2014	575928979.839091
2015	593637172.516938
2016	609134204.466869
2017	638701905.796894
2018	666008641.97921