Year	current US$
1970	697681.18708919
1971	787493.040962962
1972	1190776.49314989
1973	1396472.68176832
1974	1546529.58728438
1975	1857204.48693456
1976	1980269.71738985
1977	4473029.55291031
1978	5902965.35853551
1979	8729473.95392597
1980	10473715.9256993
1981	11253110.2967736
1982	10610937.6800693
1983	10464381.2629336
1984	15711473.9862529
1985	16623193.0104033
1986	19338623.7460422
1987	21816695.1450316
1988	22914057.2110007
1989	22903593.5796583
1990	28079053.3830501
1991	26519899.1112245
1992	30130537.4958511
1993	33778311.4307054
1994	36677162.862455
1995	31758121.7581218
1996	31722469.2649751
1997	34896846.7015499
1998	30545219.5891374
1999	31192386.5231633
2000	30503761.270958
2001	31723145.2351686
2002	33112176.0875912
2003	35455030.5978854
2004	42070047.1890906
2005	42389330.1909087
2006	42816258.6173161
2007	38819099.9486652
2008	34635530.3705117
2009	29796037.8633204
2010	33205344.2390498
2011	34615999.8053469
2012	27457150.1904171
2013	39288562.4658437
2014	52448306.2639749
2015	57440127.7714914
2016	62439724.3120613
2017	66146908.0402133
2018	69668262.2076298
2019	72562860.1207222
2020	54948512.6433598
2021	63151617.8401041