Year	constant 2015 US$
1960	5013.849698109673
1961	5631.044297874582
1962	5618.016184583085
1963	6260.201031978909
1964	6824.47445247858
1965	7524.05549094116
1966	7953.804870729188
1967	8336.573452699451
1968	8879.166585017785
1969	9869.791667469208
1970	10726.715432598885
1971	11517.738520211162
1972	12605.749178021653
1973	13564.114885219375
1974	12644.184983128713
1975	13323.564256084783
1976	14017.066723347636
1977	14242.783850257445
1978	15078.161841704828
1979	15380.095648162383
1980	15332.894308783092
1981	14959.927561412
1982	14699.587126761347
1983	14456.690781083866
1984	14674.071935995802
1985	14984.03161861032
1986	15011.862704893383
1987	14623.787498126205
1988	15195.544965432582
1989	15690.878686370726
1990	15525.77409879304
1991	15816.080411659486
1992	15805.594426541064
1993	15461.482899050623
1994	15691.945416532348
1995	15946.755124636547
1996	16331.046867662117
1997	16979.402828084392
1998	17543.237763165846
1999	18013.063226014645
2000	18642.721266698947
2001	19312.3030706347
2002	19996.46510421469
2003	21104.74143642194
2004	22118.059988224893
2005	22185.42454610896
2006	23369.15043332018
2007	24072.79181886909
2008	23928.50196250168
2009	22839.24853864175
2010	21560.35335336576
2011	19400.80773265826
2012	18123.671097191414
2013	17796.257668072198
2014	18000.418463906502
2015	18083.877905654695
2016	18070.78073228537
2017	18304.307677064462
2018	18647.49572075146
2019	19017.996429543775
2020	17283.245723491338
2021	18960.890581287546
2022	20287.725303076728
2023	20826.895578720778