Year	constant 2015 US$
1960	598.1496473470179
1961	611.7448812310442
1962	638.336664859907
1963	668.7553390433438
1964	693.0276593421943
1965	727.273587892528
1966	784.2500247753463
1967	827.0338621842857
1968	868.6036728944983
1969	899.4246158184031
1970	973.9183257450069
1971	993.3890169332504
1972	1007.7891547165694
1973	1081.2665582656193
1974	1100.4597523897335
1975	1126.7073965640377
1976	1203.1570873476987
1977	1291.9249546219592
1978	1393.6167833298728
1979	1437.2004856243395
1980	1479.244582283823
1981	1533.4454209814444
1982	1582.565462839178
1983	1637.6297308681583
1984	1698.1237968832293
1985	1743.3843916596554
1986	1806.0504203896949
1987	1942.648092937958
1988	2162.395392249841
1989	2385.227820176334
1990	2608.1683631384394
1991	2787.3995254455367
1992	2968.3150883087387
1993	3166.7041541384174
1994	3371.285825200719
1995	3595.0645821464886
1996	3748.6564045866194
1997	3598.9310845669434
1998	3283.480650905407
1999	3395.2608229065963
2000	3511.440360628651
2001	3599.095872342517
2002	3786.338111147199
2003	4023.8131956213065
2004	4241.901972954289
2005	4385.280806387681
2006	4568.556419766076
2007	4780.30338592987
2008	4826.577160836379
2009	4758.933555005179
2010	5082.253593324416
2011	5091.958016171141
2012	5425.685173779611
2013	5537.742322045604
2014	5561.697616424822
2015	5708.794091057982
2016	5878.753939544197
2017	6099.198026352396
2018	6336.239677423729
2019	6453.8940803629785
2020	6049.187610586978
2021	6133.286018482032
2022	6275.926584109547
2023	6384.807180796991