Year	current USD
1968	270900.270900271
1969	336600.336600337
1970	414000.41400041396
1971	473954.38371346897
1972	543220.6993310889
1973	643113.994711766
1974	789047.321798046
1975	1086812.23866729
1976	1317065.57789246
1977	1422666.71307991
1978	1752316.54624899
1979	2480933.27478436
1980	5537271.49808245
1981	5332041.25981644
1982	2828236.37617843
1983	2934342.48517879
1984	2623131.38120186
1985	2363606.9289299
1986	2896096.9524149
1987	3649578.35722384
1988	4688302.31363998
1989	6327951.84199137
1990	9183570.4914724
1991	10496859.8864065
1992	11427598.4373394
1993	10777425.2039891
1994	11853856.2615532
1995	13447369.480568
1996	12973518.0882656
1997	9801826.44498582
1998	8456738.92475628
1999	9040808.70966973
2000	9360142.63074485
2001	8977215.38107679
2002	9502035.9121554
2003	10882927.441177
2004	10935141.916831799
2005	10886148.046188999
2006	10814271.4322208
2007	11632288.742627
2008	15580188.9444976
2009	15316115.8705624
2010	14874416.912462201
2011	17512018.3933672
2012	16662229.6173045
2013	23200896.376061
2014	19744222.0827661
2015	17086605.413515802
2016	21999438.0281682
2017	22633506.641126603
2018	23017460.774950203
2019	22131218.959658403
2020	18478399.388301298
2021	19737978.3375688
2022	20257186.8061784