Year	current US$
1968	170000.00178813902
1969	100000.00149011599
1970	310000.002384186
1971	379999.99523162795
1972	529999.971389771
1973	819999.992847443
1974	740000.009536743
1975	740000.009536743
1976	200000.00298023198
1977	200000.00298023198
1978	540000.021457672
1979	850000.023841858
1980	1169999.95708466
1981	1179999.94754791
1982	829999.983310699
1983	610000.014305115
1984	319999.99284744303
1985	389999.98569488496
1986	349999.99403953605
1987	389999.98569488496
1988	330000.013113022
1989	419999.986886978
1990	620000.004768372
1991	419999.986886978
1992	140000.000596046
1994	70000.0002980232
1995	59999.9986588955
1996	129999.995231628
1997	-19999.9995529652
1998	340000.00357627904
1999	29999.999329447703
2000	109999.999403954
2001	100000.00149011599
2002	70000.0002980232
2003	340000.00357627904
2009	319999.99284744303
2010	490000.009536743
2011	219999.998807907
2012	218734.115362167
2013	195363.998413086
2014	202956.020832062
2015	166430.413722992
2016	172298.98273944898
2017	103862.106800079
2018	48566.7400062084
2019	49490.001052618
2020	84967.7994847298
2021	111567.959189415
2022	346276.134252548