Year	current US$
1977	4962962.962962963
1978	5937037.037037037
1979	5111111.111111111
1980	5862962.962962963
1981	9585185.185185185
1982	11459259.25925926
1983	13103703.703703703
1984	14777777.777777776
1985	15888888.888888888
1986	18270370.37037037
1987	21300000
1988	25537037.037037034
1989	28351851.85185185
1990	29344444.444444444
1991	29562962.962962963
1992	30325925.925925925
1993	32888888.888888888
1994	31011111.11111111
1995	35166666.666666664
1996	37174074.074074075
1997	39596296.29629629
1998	42762962.96296296
1999	41922222.22222222
2000	37870370.370370366
2001	38311111.11111111
2002	38433333.33333333
2003	44074074.074074075
2004	52688888.88888889
2005	56340740.74074074
2006	63240740.74074074
2007	74825925.92592593
2008	82059259.25925925
2009	86159259.25925925
2010	86707407.4074074
2011	83522222.22222222
2012	80074074.07407407
2013	78981481.48148148
2014	84318518.51851851
2015	85562962.96296296
2016	92440740.74074073
2017	84892592.59259258
2018	118718518.51851851
2019	118214814.8148148
2020	85029629.62962963
2021	94096296.29629628
2022	97425925.92592593
2023	106840740.74074073