Year	current US$
1960	521840005.34564304
1961	485030004.229397
1962	560949992.30653
1963	541000000.132248
1964	565500009.458512
1965	771439989.313483
1966	936370017.915964
1967	1099080006.42061
1968	1163130004.4246
1969	1244949969.35129
1970	1358769985.10957
1971	1560019992.36643
1972	1762580024.30201
1973	1948919972.74756
1974	2446089990.98279
1975	2049509985.4599698
1976	1778789998.56114
1977	1712770019.33195
1978	2457819982.86583
1979	2905619991.7681503
1980	3280489999.44143
1981	3579729967.7412996
1982	3387400020.7222996
1983	3456439982.9786296
1984	3563269933.01325
1985	3613709959.75286
1986	4455649995.52071
1987	5302280106.71958
1988	6285299989.77855
1989	6520190013.028681
1990	7305410003.60996
1991	7038869975.86489
1992	9458129997.29253
1993	8854749848.2056
1994	9179850052.87454
1995	9448259942.013771
1996	7759069830.49214
1997	6543680136.203771
1998	8096189836.8597
1999	9566739985.466
2000	8242370089.76936
2001	7084490101.57585
2002	6999100062.3703
2003	6797159977.43607
2004	6698899950.027471
2005	9265909940.24277
2006	7555189963.34076
2007	8339119774.81842
2008	8444590152.263639
2009	9501000046.73004
2010	9439890192.5087
2011	7499870029.44946
2012	8868360128.40271
2013	12010670212.745699
2014	9495230051.99432
2015	8525499851.584431
2016	7720130126.95313
2017	8414689969.53964
2018	8280039897.918699
2019	7119960081.33888
2020	12714009916.782398
2021	10515909809.1125