Year	current US$
1974	14362704.24278387
1975	15603255.598195082
1976	15784093.033872662
1977	17627285.3980487
1978	21107947.362056267
1979	25292496.22222079
1980	31290748.02634775
1981	30293104.721369702
1982	35980888.07373746
1983	37859965.45278153
1984	40317230.97507223
1985	42724359.702747546
1986	45466715.838077866
1987	53181815.80762997
1988	59629551.41185386
1989	28707791.481947515
1990	34012897.97206451
1991	37834100.31547567
1992	40380805.74990162
1993	44232391.44171493
1994	48993874.73452382
1995	54987917.80580298
1996	57401167.767462075
1997	63788872.08160527
1998	57132579.90848481
1999	56810526.75672598
2000	61477943.552152805
2001	63547322.884173505
2002	63901299.46140597
2003	80144278.75831643
2004	88755422.34538771
2005	90223786.75279997
2006	80997751.32116961
2007	84466744.78568803
2008	91520618.24753186
2009	97554670.83376588
2010	100476051.12984219
2011	106525650.02508122
2012	124843245.70031057
2013	123884440.59381409
2014	147509155.19636318
2015	142554681.72121686
2016	137219829.63006398
2017	131766591.28055726
2018	138062552.31040558
2019	132814086.30139296
2020	146170951.2844431
2021	175962247.55489442
2022	182856378.30358618
2023	180774860.76778746