Year	current US$
1967	238.55453148551896
1968	267.69767775736597
1969	295.87823827511704
1970	315.63101658924484
1971	341.2376200947496
1972	417.9599103055475
1973	505.83963103790103
1974	694.4588299663133
1975	911.6792035553942
1976	1128.8330122684154
1977	1173.3754291693303
1978	1257.1381522337076
1979	1471.411528814752
1980	1657.331277535469
1981	1698.4639589842664
1982	1818.9785915024231
1983	1779.3409783639925
1984	1758.7989678648444
1985	1889.661248070608
1986	1968.7091278334328
1987	2029.0296439508948
1988	1939.2443657151396
1989	1774.6012575071134
1990	2003.0971321094394
1991	1203.4196585106258
1992	1224.6915900583124
1993	1196.7093614906819
1994	1243.5447981679185
1995	1238.042003362648
1996	1351.7486832775655
1997	1436.3570503256785
1998	1467.839069510201
1999	1504.8884086105902
2000	1595.9567942664971
2001	1642.9101426890174
2002	1603.303173290431
2003	1664.1555073878817
2004	1880.2384454935348
2005	2130.254975107285
2006	2419.413361749081
2007	2827.470680359342
2008	3322.87969113321
2009	3629.6049999686657
2010	3953.206503635397
2011	4121.458588256311
2012	4616.188450827889
2013	4702.6543652623695
2014	4546.275313540315
2015	4099.251759662017
2016	3994.2933885284133
2017	3826.4574917136824
2018	3728.413978323596
2019	3589.8814191541283
2020	3199.607601870574
2021	3505.0160111206987
2022	3864.7057175013288
2023	3965.0428783261214