Year	current US$
1967	298.4963522383551
1968	305.552186895602
1969	331.2071934848504
1970	356.0589349389271
1971	372.58572419058453
1972	403.12258133762043
1973	477.81384417343907
1974	583.9702856491962
1975	690.7029147565537
1976	725.470769835244
1977	753.5160108117657
1978	819.4513485665015
1979	940.9480502604818
1980	1095.596058744707
1981	1201.6909032384851
1982	1177.4550128609662
1983	1092.067749427766
1984	1001.3783534435082
1985	997.1121625278352
1986	1031.5356303172491
1987	1092.9102485549358
1988	1146.4977261080776
1989	1120.884772941698
1990	934.1965753164314
1991	864.6062694864238
1992	903.0836341672097
1993	931.9529464817595
1994	976.3352756780843
1995	1055.2296407552324
1996	1158.287505347568
1997	1233.3644946079105
1998	1197.0357530138494
1999	1175.468370175054
2000	1214.1255616431392
2001	1222.12954155942
2002	1235.8221017110845
2003	1337.3156120186418
2004	1550.5643175183943
2005	1802.6658050163278
2006	2082.779017963608
2007	2458.891467173155
2008	2889.87314841637
2009	3099.301851927257
2010	3442.189587542638
2011	3814.041239210683
2012	4303.56680155234
2013	4635.280091625712
2014	4782.329074721728
2015	4635.353455359451
2016	4533.756490427114
2017	4610.584796367661
2018	4940.780828496325
2019	5182.249792850384
2020	4987.868283344323
2021	5490.466752550993
2022	5902.543320181788
2023	6164.249757588857