Year	current US$
1970	8618614.21281422
1971	10315522.3251896
1972	11630642.9548564
1973	19295847.9593624
1974	50757202.2435792
1975	31425442.0910795
1976	39225665.1612253
1977	47542307.5271534
1978	79990815.7032681
1979	113356581.144573
1980	183106703.302066
1981	200611798.296138
1982	177168782.737701
1983	150243465.112365
1984	152983428.232088
1985	144967922.675783
1986	122083963.429694
1987	127052550.114491
1988	135541923.32571
1989	142542147.425451
1990	161165686.348916
1991	150143069.186647
1992	166304747.333684
1993	155200882.039539
1994	159456126.012889
1995	175446394.725844
1996	194735084.198341
1997	242132955.619583
1998	211260494.718324
1999	254092927.971172
2000	337672730.38704
2001	346418523.332283
2002	378856789.045559
2003	472843195.243625
2004	601414223.847396
2005	768307841.061613
2006	1105728161.01848
2007	1403652817.62682
2008	1953143406.59341
2009	1704680345.74694
2010	2307924041.41606
2011	3377539284.86464
2012	4044040759.85649
2013	4602513015.37906
2014	5065080864.28871
2015	3930249162.02267
2016	3611046384.72327
2017	3711803573.82501
2018	4273113977.77248
2019	4197736571.47503
2020	3461634342.74857
2021	4332080551.95081