Year	current US$
1974	79999.9982118606
1975	209999.99903142464
1976	479999.9948590999
1977	890000.0117719169
1978	2450000.0253319764
1979	3899999.9258667217
1980	5939999.867230652
1981	6550000.119954339
1982	8069999.892264603
1983	8810000.015422706
1984	8539999.930188058
1985	11090000.145137306
1986	13969999.913126234
1987	15909999.646246418
1988	14700000.008568177
1989	12270000.096410513
1990	14990000.028163197
1991	15220000.24653971
1992	19869999.88555909
1993	26450000.00298024
1994	38219999.40648676
1995	62179999.85441565
1996	74089999.59379432
1997	87380000.86322433
1998	88309999.03008349
1999	89890000.5649775
2000	105510000.01654038
2001	129739999.88846481
2002	192069999.12671736
2003	239070004.81709832
2004	289689997.2055107
2005	320679998.88956547
2006	404780003.2738596
2007	511379997.4713475
2008	575790001.563728
2009	445089998.57492757
2010	414439999.95663756
2011	414930001.8213689
2012	363489997.94758844
2013	359120003.5475195
2014	352880002.1335482
2015	288639998.9910423
2016	271729999.4081258
2017	275379997.53654003
2018	285859999.02151513
2019	282280000.1110881
2020	289490001.1215358
2021	314540001.88410276
2022	314529999.61003655