Year	current US$
1977	124541062.8620976
1978	135265700.54843792
1979	159227053.2170177
1980	185990338.2541011
1981	183864734.3883404
1982	193574879.3205676
1983	220096618.46381468
1984	248599033.86790788
1985	265314009.66183534
1986	264251207.72946897
1987	309323671.4975847
1988	325942028.9855073
1989	313864734.29951656
1990	347826086.9565218
1991	271642512.0772952
1992	360337294.68599033
1993	288060000
1994	299368464.4826147
1995	337158351.9290589
1996	330859831.238139
1997	377191455.2034915
1998	442175801.136315
1999	462638564.70095885
2000	478863818.6887975
2001	512562596.7547509
2002	554157293.5390285
2003	688770434.8942335
2004	931818977.2561651
2005	1178054839.3380914
2006	1154218521.2127283
2007	1733466284.1329978
2008	2360623830.470609
2009	2186745095.211733
2010	2537666664.6458077
2011	3410933000.825375
2012	3581015175.213308
2013	3454444626.283964
2014	4433299140.455464
2015	4883765732.167208
2016	5213862722.235516
2017	5003635502.08959
2018	6128799888.465532
2019	6079324237.391168
2020	5374653332.417314
2021	6512390359.934232
2022	7447007530.67779
2023	7632744345.990147