Year	current US$
1960	439999985.71428573
1961	442857151.4285714
1962	465714294.28571427
1963	482857134.28571427
1964	514285685.71428573
1965	619999991.4285715
1966	642857134.2857143
1967	662857142.8571428
1968	762857120
1969	720657258.2159624
1970	480734591.28555995
1993	2562599852.0639644
1994	2652515550.6227164
1995	3263141349.069691
1996	3436888621.2839212
1997	3110171377.6601157
1998	2983841994.142705
1999	3159655987.3783855
2000	3245072215.1011934
2001	3376819400.8664627
2002	3594179315.0370183
2003	3892996603.4179444
2004	4544165485.148022
2005	5304675025.778864
2006	5889665439.10315
2007	6751403682.397058
2008	8223981042.119303
2009	7922060728.855055
2010	9139053240.077335
2011	10630521218.923248
2012	11255397038.928837
2013	11974883292.072754
2014	12952994860.185759
2015	13863294020.773155
2016	15236699069.935118
2017	16276174986.759043
2018	17367546414.58983
2019	18818517904.97841
2020	17982627547.613583
2021	17759165579.798622
2022	18218299214.832626
2023	13268908592.996168