Year	current US$
1960	228032260.48516166
1961	242032262.72516203
1962	259056265.44900247
1963	273728267.79652286
1964	302288048.36608773
1965	341040054.56640875
1966	388864062.21825
1967	439823958.3718333
1968	481487853.0380565
1969	544207863.073258
1970	625856212.1369939
1971	682633519.039193
1972	815291261.8452551
1973	1216990146.4819617
1974	1359618525.9507425
1975	1284211139.518231
1976	1460885057.7757258
1977	1607009279.6635869
1978	1920513453.4682794
1979	2240371503.1956134
1980	2486042095.7871423
1981	2410965173.6266413
1982	2249417028.456595
1983	2419673119.28778
1984	2471643377.344884
1985	2334667014.5574293
1986	2573773900.726158
1987	3000113338.598236
1988	3515356039.365529
1989	3412564319.6238456
1990	3096328114.696961
1991	3663550420.1680675
1992	3979218121.50114
1993	4540892886.345053
1994	5097500696.517413
1995	4369966397.245921
1996	4694307814.8710165
1997	4612875950.073216
1998	3523699121.0605545
1999	3191756597.0854664
2000	3302783383.9699073
2001	2831562398.127019
2002	2773645401.2043853
2003	3129731125.306019
2004	3558965608.2192636
2005	4527603062.540297
2006	7530558913.350355
2007	8824837742.374752
2008	11026839717.816605
2009	10763853491.452168
2010	13182459454.549599
2011	16273190424.172386
2012	20197600410.434006
2013	19541529643.44111
2014	22809098942.262184
2015	20275602583.719475
2016	19833357750.59854
2017	21681623582.37675
2018	22797902511.73309
2019	23031967198.596737
2020	23121545739.939087
2021	24967099515.15801
2022	29798020788.735546
2023	29106061447.858215