Year	current US$
1960	407937919.16286284
1961	338551385.3008043
1962	295609477.91992366
1963	363303608.39842284
1964	482559930.4666936
1965	487026285.590798
1966	532442039.737034
1967	552678733.1131612
1968	547646322.5885199
1969	676143872.9151263
1970	663844981.7462565
1971	636045665.8739536
1972	693005949.8499781
1973	725984746.6936662
1974	1245048378.173145
1975	1456812813.3375888
1976	1756438333.9619677
1977	2285177600.0704336
1978	2347159289.2995744
1979	2909639717.4246464
1980	3279382824.3728747
1981	4033559074.796828
1982	3930656784.5998235
1983	3307013059.2553835
1984	3744685704.4524326
1985	3706977642.290657
1986	3142973484.2989793
1987	2959306507.8172445
1988	2805892022.2786717
1989	2969677475.51077
1990	3403072071.522259
1991	4015899949.9749875
1992	4670557278.639319
1993	4240948474.2371187
1994	5187218609.304652
1995	5415443721.86093
1996	5530716358.17909
1997	5750796398.1991
1998	5575676838.4192095
1999	4178144072.0360184
2000	4198824412.2061033
2001	4724223000
2002	5106837000
2003	5361954000
2004	5602578000
2005	5922520000
2006	6418808000
2007	7037373000
2008	8371941000.000001
2009	8597649000
2010	9142985000
2011	10149903000
2012	11054333000
2013	11840663000
2014	13492085000
2015	13900706000
2016	14252859000
2017	14554047000
2018	14365969000
2019	13641521000
2020	12406730000
2021	14128313000
2022	15091742000
2023	14791563000