Year	current US$
1970	16585921.4825869
1971	19441447.7489085
1972	22175036.7132909
1973	30887777.5713051
1974	38249234.1115896
1975	53137390.0491191
1976	54848888.2259823
1977	60563812.7377116
1978	78695902.166028
1979	94562924.9362155
1980	115915859.484596
1981	109876076.11909
1982	110078263.819201
1983	115411534.256269
1984	118908179.61055
1985	146047422.63407
1986	214857659.733524
1987	252188643.360346
1988	255012690.617278
1989	258315025.101345
1990	314355252.328602
1991	321755461.771474
1992	346375114.0742
1993	324716549.366576
1994	334390486.971853
1995	419886645.1085
1996	416248375.86644
1997	378651626.797782
1998	394191402.720723
1999	396015093.181164
2000	358610174.942718
2001	356576931.898932
2002	394430332.015898
2003	491466524.995547
2004	551967995.31997
2005	542613305.106808
2006	548095181.401761
2007	632337006.401289
2008	673829728.378706
2009	608574911.898264
2010	598703565.407364
2011	606598454.155986
2012	570168710.92349
2013	612720899.239162
2014	629669111.597505
2015	567437124.947691
2016	593707965.015384
2017	629889397.40694
2018	646955105.575899
2019	644337470.894204
2020	651450555.818754
2021	688623482.177207