Year	current US$
1965	1789.0689381503985
1966	2108.499658303483
1967	2084.8565274454504
1968	2363.5195073196705
1969	2134.7748578045935
1970	2154.8379499078555
1971	2431.1716983884544
1972	2581.379900488535
1973	3294.9499786912406
1974	4103.028783813036
1975	4936.770208247743
1976	5072.798541619014
1977	5323.215544966518
1978	6540.504311663057
1979	7662.7741886402555
1980	8071.446625767323
1981	7310.84404829694
1982	7088.88775513012
1983	7172.510924865051
1984	7237.479634182394
1985	7720.9546330514695
1986	11509.231719496118
1987	13603.736554697995
1988	13500.031535870197
1989	13223.94471855307
1990	15728.718798069658
1991	15828.145447996822
1992	16909.975664540503
1993	15844.375177312713
1994	16145.869186111766
1995	18090.58808140392
1996	17713.72313161325
1997	15741.809155365401
1998	16070.299951516807
1999	15847.930298240608
2000	14346.186262712208
2001	14012.242966303244
2002	15302.351854502838
2003	18724.491519915427
2004	20829.065712508407
2005	21047.19299986177
2006	21382.23571257528
2007	23837.817532645888
2008	25437.668581751663
2009	23326.087557300634
2010	21447.858255316703
2011	21747.988841672915
2012	19864.53569983728
2013	20941.517340457423
2014	21223.075487689068
2015	18252.514203209405
2016	18726.639470476355
2017	19743.959021152492
2018	20614.89436817308
2019	20093.208580556693
2020	19185.697770290597
2021	20230.2410482554
2022	18984.8510962405