Year	constant 2015 US$
1967	14166583.74904906
1968	15446695.078694249
1969	15873394.263956776
1970	16897490.21483971
1971	16897490.21483971
1972	16897490.21483971
1973	18433623.810770918
1974	19543051.33421331
1975	21932597.07452717
1976	22956686.138481304
1977	23554076.01687543
1978	24748842.00010356
1979	24748842.00010356
1980	25431570.338283423
1981	26114298.67676077
1982	28503844.417074632
1983	31746795.41632975
1984	38232697.41127024
1985	42073038.28624218
1986	40622243.15098915
1987	41646332.21553824
1988	47235922.116056405
1989	50306254.023512036
1990	51250968.88502285
1991	52353144.07589757
1992	52195691.58807154
1993	52668046.076762855
1994	53455311.49067972
1995	54782628.61532981
1996	54976998.206708156
1997	55801647.76569689
1998	56638675.41234729
1999	57488259.633864276
2000	58638017.68705337
2001	59612539.97723224
2002	62399465.968037285
2003	63436185.0995596
2004	67036875.90463962
2005	78793301.55590184
2006	82038017.47947618
2007	85230305.76139009
2008	78173480.93850014
2009	74839354.82440454
2010	75151555.71890195
2011	78096172.18047293
2012	80021808.16390455
2013	82565283.55676319
2014	85254942.94524348
2015	87503938.24826717
2016	81338389.28317831
2017	74939572.4151841
2018	74036804.95617247
2019	70204104.58298182
2020	49398466.88554221
2021	35467536.02748946
2022	35866793.450673774