Year	constant 2015 US$
1960	497.418490672238
1961	497.81724309562026
1962	511.28323438931227
1963	510.58096410025286
1964	534.5951581708946
1965	562.0935194283146
1966	560.7132503846211
1967	550.0725083762451
1968	550.2692891909198
1969	585.6696475918831
1970	623.8725906463195
1971	633.2266234219127
1972	626.9194950843072
1973	628.9328870466567
1974	638.6781038371608
1975	637.2118172067209
1976	622.7447627365802
1977	611.382323554982
1978	613.9068216551765
1979	628.9911308732037
1980	646.2485190994265
1981	651.4003783036966
1982	668.5272373433576
1983	640.4929092397484
1984	652.0716060919384
1985	603.7439330571996
1986	596.3358644922475
1987	622.4594792173784
1988	562.9393569384966
1989	553.0131678031247
1990	549.5748054323907
1991	555.7193689782893
1992	458.0757059097739
1993	465.0075008670291
1994	453.9164275588816
1995	416.7161348460278
1996	421.7597053815613
1997	391.7765200617359
1998	394.7420044336515
1999	384.7526851713987
2000	400.5989342846924
2001	354.0893912889941
2002	423.34098161518915
2003	445.23035939445174
2004	458.44687404951435
2005	465.77840469011795
2006	475.1571473122926
2007	501.8810166710661
2008	515.9835751530545
2009	518.167904422153
2010	537.3789764436517
2011	554.5386429382136
2012	622.2567681993728
2013	734.3541688375205
2014	748.9284173301517
2015	581.2934118149541
2016	603.4089380399014
2017	611.0839948074015
2018	617.5295194306688
2019	634.9856157162064
2020	608.338120204502
2021	619.2692233221758
2022	626.9020435102716
2023	634.7371895574639