Year	current US$
1977	1437241.111111111
1978	1713342.5925925926
1979	1894888.8888888888
1980	2719411.4814814813
1981	2666460.3703703703
1982	4444100.740740741
1983	3963759.629629629
1984	5064383.703703703
1985	6456238.148148147
1986	6789072.962962963
1987	8188492.222222222
1988	9644644.074074073
1989	10904121.481481481
1990	11849674.814814813
1991	12908703.703703703
1992	14739296.296296295
1993	12904925.925925925
1994	14243814.814814813
1995	15692407.407407407
1996	16929185.185185183
1997	17836925.925925925
1998	20435296.296296295
1999	22897518.51851852
2000	23582111.11111111
2001	23459777.777777776
2002	23590740.74074074
2003	22981740.74074074
2004	20138703.7037037
2005	20141962.962962963
2006	23640481.48148148
2007	27268518.518518515
2008	27370000
2009	25570518.51851852
2010	26622222.22222222
2011	26300000
2012	25970370.37037037
2013	28485185.185185183
2014	31181481.481481478
2015	34088888.88888889
2016	35600000
2017	34677777.777777776
2018	36355555.55555555
2019	40918518.518518515
2020	32648148.148148146
2021	37207407.4074074
2022	41307407.4074074
2023	47059259.259259254