Year	current US$
1960	0.03505308121492582
1961	0.8757031313167768
1962	2.2509639753224318
1963	2.0811012703692957
1964	9.027233580091583
1965	8.595803354162866
1966	7.6961019753698
1967	7.004772275466619
1968	8.87902157946544
1969	9.449779606137163
1970	9.599995660293576
1971	8.930090469812324
1972	8.073599992792106
1973	10.119262459633491
1974	11.546937221063983
1975	14.543372720930478
1976	15.043351587181022
1977	14.01717889241252
1978	16.82289293131507
1979	19.999079353144456
1980	25.265511018647828
1981	14.272258436291503
1982	15.246778979557712
1983	16.733373266058578
1984	12.782956113350389
1985	11.778313652833004
1986	16.918474540706868
1987	22.55169886350042
1988	38.46079761408933
1989	34.420479763233054
1990	57.62963093311159
1991	50.92459582001677
1992	58.862870327601506
1993	57.34487191200033
1994	115.46638481757768
1995	84.78762856145785
1996	65.1389870391297
1997	29.148144498894165
1998	60.99190550793273
1999	27.39403539379963
2000	20.888506347311225
2001	10.790081303160633
2002	60.36565356606635
2003	14.003846390677841
2004	8.665993384482356
2005	4.811753518834494
2006	12.743078943701569
2007	9.428944862943327
2008	19.281829112934417
2009	107.24178078513768
2010	40.02406801835877
2011	66.67512382312984
2012	132.13248522469422
2013	56.674740868561
2014	40.226903765851446
2015	27.62118800775285
2016	25.431140756094855
2017	33.36886230329468
2018	37.65868279706647
2019	44.8841264465479
2020	58.28182358016529
2021	57.365738937504716
2022	70.11406070138423