Year	constant 2015 US$
1960	6388.878100649756
1961	7094.470464543827
1962	7655.055260312262
1963	8219.987396604256
1964	9084.79518054167
1965	9510.549565778634
1966	10426.639902799605
1967	11462.926386558678
1968	12794.623623776715
1969	14221.052367239192
1970	14114.315817907638
1971	14456.82119534587
1972	15455.136942839092
1973	16463.279172506456
1974	16046.784682382175
1975	16333.674818325617
1976	16801.925030625847
1977	17370.616546841185
1978	18120.728426982085
1979	18953.33391373994
1980	19334.37474424011
1981	20011.82925088526
1982	20525.29585147131
1983	21122.964842305148
1984	21912.15186185235
1985	22898.994241502343
1986	23527.712518845907
1987	24503.084565780217
1988	26026.86488211075
1989	27199.939969537045
1990	28422.21311951249
1991	29308.274088137015
1992	29462.65396709481
1993	29232.43979281779
1994	29466.75524517557
1995	30171.163792434683
1996	31046.170154464777
1997	31276.19307719317
1998	30795.0888900928
1999	30636.26611694303
2000	31430.63113032816
2001	31476.05206657895
2002	31416.124177243524
2003	31830.217584926173
2004	32515.11580243171
2005	33098.54746648719
2006	33531.51856307746
2007	33990.03603416851
2008	33557.64540415313
2009	31651.083773985338
2010	32942.2020783725
2011	33011.13423010999
2012	33518.44493689205
2013	34239.88624736835
2014	34386.905855287005
2015	34960.63938433849
2016	35242.199377188066
2017	35861.97285458378
2018	36138.52908247195
2019	36043.78440133654
2020	34650.79678027662
2021	35701.45427161423
2022	36202.63927489802
2023	37079.1092202813