Year	current US$
1976	19662595.1731799
1977	21562335.7731016
1978	28266894.7309792
1979	38966845.508982
1980	69580083.5820896
1981	73633502.7894004
1982	76104310.7274968
1983	77765097.6640714
1984	77548600.0000001
1985	82800415.3550864
1986	100838305.084746
1987	121036933.739342
1988	135556243.91468
1989	145035466.982249
1990	172273180.153649
1991	189341512.5
1992	240323571.056063
1993	242398248.174323
1994	272808545.357143
1995	358387291.073739
1996	441770422.11803
1997	418438787.136842
1998	490879457.678325
1999	434403570.550162
2000	457365842.242952
2001	485686859.107468
2002	567554829.615383
2003	854007394.790488
2004	970945866
2005	1032773124.73573
2006	1148994398.19345
2007	1375151223.24117
2008	1654254821.19701
2009	1646444228.12969
2010	1582147864.11507
2011	1685066441.27673
2012	1526184156.27267
2013	1498901138.85967
2014	1454705996.76006
2015	1207577628.56925
2016	1214765541.17847
2017	1210978168.98399
2018	1332633129.81343
2019	1316042752.14384
2020	1246817117.36085
2021	1394685936.13307