Year	constant 2015 US$
1960	9683.8009018408
1961	10408.770796901046
1962	10979.94978049448
1963	11511.604712162109
1964	11736.717907717586
1965	12018.639287986554
1966	12639.30144494197
1967	13448.934346875032
1968	14238.870227885674
1969	15021.891261281718
1970	15736.183633010072
1971	15947.722064490794
1972	16442.657988645853
1973	17495.285045183664
1974	18337.16057955736
1975	17846.974551080748
1976	19023.504174957445
1977	19427.91105926483
1978	19986.0625779522
1979	21115.919462377842
1980	21795.254518936617
1981	21952.884861274404
1982	22027.35453274067
1983	22276.81237613804
1984	22990.290329832154
1985	23626.74926845896
1986	24301.143375990265
1987	25074.267315293622
1988	26113.355515232917
1989	26977.932662820476
1990	27490.632039762688
1991	27894.24279471764
1992	28107.859025844486
1993	27851.12135750159
1994	28444.410254774106
1995	29265.089048092574
1996	29627.48694842242
1997	30153.775175326842
1998	30690.911722108016
1999	31184.61638745658
2000	32350.90436687466
2001	32963.67060902657
2002	32998.20319000806
2003	32897.39077889762
2004	33150.47621694159
2005	33257.76980326837
2006	33751.7000191328
2007	34081.09032987092
2008	33530.36014495967
2009	31615.27081450848
2010	32058.173994079807
2011	32229.45679109041
2012	31184.558425589585
2013	30257.62742593508
2014	29979.918721735787
2015	30242.38613521843
2016	30685.64589894298
2017	31244.22709892243
2018	31593.48026215985
2019	32114.299856399433
2020	29375.03734083498
2021	31980.64124029732
2022	33364.109046133075
2023	33774.02018552384