Year	current US$
1974	19999.9995529652
1979	740000.009536743
1981	29999.999329447703
1982	1169999.95708466
1987	600000.023841858
1988	419999.986886978
1990	129999.995231628
1991	1789999.96185303
1992	300000.011920929
1993	3349999.90463257
1994	12109999.6566772
1995	5809999.94277954
1996	5429999.82833862
1997	1899999.97615814
1998	9930000.30517578
1999	13109999.6566772
2000	14630000.1144409
2001	8430000.30517578
2002	15579999.923706101
2003	13140000.3433228
2004	8470000.26702881
2005	23399999.6185303
2006	17479999.5422363
2007	21799999.237060502
2008	14399999.6185303
2009	13350000.3814697
2010	25219999.3133545
2011	33250000
2012	14609999.6566772
2013	29649999.6185303
2014	39020000.4577637
2015	32220001.220703095
2016	28639999.3896484
2017	28520000.4577637
2018	31149999.6185303
2019	25920000.0762939
2020	22129999.1607666
2021	28870000.8392334
2022	30530000.6866455