Year	current US$
1974	2689999.982714649
1975	1420000.005513428
1976	2629999.99523163
1977	4410000.08583069
1978	2710000.066086648
1979	3079999.92370605
1980	2590000.0333786
1981	6659999.975934623
1982	2309999.9688565745
1983	1409999.9517202375
1984	1549999.974668026
1985	2069999.9816715708
1986	4390000.022947787
1987	4820000.050589446
1988	7419999.865815038
1989	3819999.910891054
1990	3929999.917745589
1991	6669999.8807162065
1992	4409999.949857583
1993	2899999.9724328476
1994	3810000.121593484
1995	1409999.9517202387
1996	2070000.0580400252
1997	2379999.9915063395
1998	7210000.006482008
1999	8949999.863281844
2000	4120000.0122189554
2001	6889999.853447077
2002	13779999.85963106
2003	3600000.0126659838
2004	1719999.9708682264
2005	7330000.119283795
2006	3250000.027939677
2007	4250000.139698386
2008	3080000.0503659253
2009	3349999.95678663
2010	19269999.995827716
2011	15100000.362843275
2012	1550000.026822089
2013	1389999.9931454668
2014	1779999.935999508
2015	1379999.9896436927
2016	5079999.86968935
2017	5440000.049769884
2018	3340000.094845895
2019	7269999.766722316
2020	4710000.114515426
2021	3010000.016540284