Year	constant 2015 US$
1960	560.2965161217475
1961	557.2777456911714
1962	575.8493514894751
1963	555.6859561975939
1964	531.2865047205228
1965	524.4271976985598
1966	505.5069579499028
1967	500.1147396274792
1968	488.637955851374
1969	512.3288929793879
1970	511.5766840087003
1971	490.03812550025
1972	485.0613456386382
1973	434.3568361376711
1974	445.91981653718636
1975	476.1539882369112
1976	481.0489162210338
1977	483.0382990608792
1978	472.4184950256907
1979	363.58593706829436
1980	341.1876851355768
1981	344.6681967698245
1982	346.31898405044956
1983	381.1317584078563
1984	384.0888008311901
1985	463.3632640913919
1986	431.3751321803515
1987	406.5583628921925
1988	453.9029121405901
1989	460.3265687083539
1990	429.2491462877336
1991	449.2814379419042
1992	465.17601237827455
1993	383.25914452417913
1994	412.84427713058955
1995	399.99949199785084
1996	391.1730187511442
1997	399.3881427590071
1998	412.8431343108805
1999	396.0118251980621
2000	379.3515468456472
2001	409.70366868086694
2002	429.4269738785443
2003	473.4680216881795
2004	605.2393549388994
2005	682.3538733856007
2006	662.88550503464
2007	661.7723647130425
2008	658.8744605996408
2009	662.923252830749
2010	727.5249450733303
2011	703.1232150627579
2012	739.338364774171
2013	754.1718132913204
2014	777.9356810802773
2015	774.4116031241186
2016	703.4660071095827
2017	660.1261337515457
2018	653.3497614934964
2019	652.7032159714877
2020	622.2785062805926
2021	595.8495005605093
2022	593.7719296389289
2023	599.4683862031419