Year	current US$
1960	0.014962242445911624
1961	0.45016399754853603
1962	1.7398125733513319
1963	1.276375304869578
1964	3.0527430013773116
1965	3.773761619527234
1966	4.2968554877024685
1967	2.920949227441145
1968	4.668749673932172
1969	3.830568018377901
1970	3.589776199245725
1971	4.776021579260655
1972	5.956997032891099
1973	10.938371719414365
1974	17.641221393851037
1975	21.52889087119452
1976	12.785620072531263
1977	15.889640667480567
1978	22.20859306713207
1979	25.980596607393323
1980	36.13660038834894
1981	30.268699196857398
1982	27.134943638586424
1983	27.76850841221504
1984	39.796521478031465
1985	46.24647458672627
1986	45.43595945491319
1987	42.49893931383641
1988	50.52292642633016
1989	50.965782408288945
1990	53.568319804518616
1991	49.28556779136152
1992	46.15076307249501
1993	38.91648895915304
1994	45.321169078851625
1995	54.47080464558959
1996	48.378855215172145
1997	41.44391465913251
1998	32.65579056720335
1999	32.462237050847065
2000	25.62838509458381
2001	30.364756080062595
2002	35.178781207390486
2003	45.06745619336235
2004	45.89869959900149
2005	54.97418331414741
2006	63.80132831890263
2007	61.81914713358943
2008	58.73226056234638
2009	54.4648360051315
2010	70.28445099181342
2011	79.02998859689257
2012	60.28452232184867
2013	82.18756218193943
2014	70.41095386609669
2015	66.34164326291963
2016	64.44455422430171
2017	70.42799734113686
2018	78.10307911073366
2019	88.28767159105291
2020	73.79367694236724
2021	65.61885963950806
2022	53.03672586173778