Year	current US$
1960	344.1039789009151
1961	365.2716817768838
1962	378.07113027933514
1963	423.50049109442654
1964	419.07898609810877
1965	441.8343933107481
1966	474.62184587943085
1967	524.8076653467365
1968	524.0977410739835
1969	587.683575756565
1970	688.534666174412
1971	770.8860444055127
1972	877.8643672277523
1973	1065.923091270216
1974	1268.2858213845484
1975	1627.6603869826927
1976	1755.1659838768862
1977	1983.0638417748773
1978	2202.644953189481
1979	2656.647348931887
1980	3992.0363384715265
1981	4374.851750408015
1982	4552.944470620926
1983	4818.683872583132
1984	5235.1341193735
1985	5465.203581533242
1986	5990.46012778123
1987	6589.3831441274815
1988	7005.502808621939
1989	7753.025660199404
1990	7772.808756843042
1991	7789.391377411237
1992	7520.790739858269
1993	7905.6768023859895
1994	8220.276110027862
1995	8451.958598855488
1996	8994.324062933154
1997	9491.475434106995
1998	10685.260612297501
1999	11173.94936799911
2000	11560.2459031879
2001	11510.04043304431
2002	11658.629036797958
2003	11998.175694114745
2004	12828.438948995363
2005	14173.751377668596
2006	15595.168346121845
2007	17225.534364362447
2008	17570.782914886204
2009	16314.669218491477
2010	16507.430536090655
2011	16924.06692173105
2012	16736.92183477735
2013	16952.1344337493
2014	16980.02706374575
2015	17040.417609131087
2016	17398.98707693191
2017	17910.783095201423
2018	18335.950058636765
2019	19156.03986722821
2020	17028.413783029857
2021	17586.33001422475
2022	20738.45118681982
2023	22672.61543507314