Year	current US$
1965	548.4901882405032
1966	561.0646049951016
1967	499.08329698509976
1968	410.5822551828346
1969	476.5864539193959
1970	410.6397976286379
1971	414.441997125323
1972	462.5092076653131
1973	533.9913793361667
1974	655.2278574804051
1975	722.4888625964694
1976	878.3534044370216
1977	1045.556887475751
1978	1257.6499726244092
1979	1530.05118646442
1980	1763.7417939713375
1981	1900.5636746108898
1982	1945.3707640510086
1983	1956.7049234649035
1984	1888.6986201599043
1985	1814.8704486259778
1986	2223.089349258142
1987	2241.093047082825
1988	1988.3116559677371
1989	1274.9720092168857
1990	1195.225836284145
1991	1184.947653597991
1992	1373.4130823036849
1993	1375.5475291087346
1994	1457.7031321938682
1995	1509.040549362123
1996	1503.1439671812661
1997	1530.7038436719008
1998	1633.280881864953
1999	1646.192662388863
2000	1673.3581251064352
2001	1738.383837658324
2002	1816.4064928957432
2003	1889.4378392036008
2004	2062.6959704735173
2005	2216.9451815491047
2006	2478.291944087338
2007	2643.1684392965026
2008	3416.1239012612186
2009	3618.89261685515
2010	3914.701231053889
2011	4152.493980985822
2012	4386.4618185537975
2013	4477.618320708606
2014	4255.894302133854
2015	4064.2530104364205
2016	4003.4047464117743
2017	4073.1164031466824
2018	4146.40731063215
2019	4159.653753775904
2020	3998.673138292354
2021	4152.757954263884
2022	4311.000050681601
2023	4482.086026303367