Year	current US$
1970	26089999.640360445
1971	29739999.795332544
1972	49040000.097826175
1973	37449999.93965028
1974	85750002.15694311
1975	147600001.30534166
1976	112769998.37160105
1977	128380001.59710652
1978	136839999.88436702
1979	198249998.18950897
1980	224800000.16093245
1981	170500001.29453835
1982	171889998.76938742
1983	149789999.1199374
1984	150319999.92765486
1985	155650001.8108636
1986	236560004.7577172
1987	253159998.05554748
1988	291669999.02576196
1989	429850001.521409
1990	313829996.7311324
1991	375569999.70600015
1992	429499999.9906868
1993	427089994.13624406
1994	399730000.9485335
1995	376350003.15494823
1996	455749997.76110053
1997	363870000.8727608
1998	273510000.5697459
1999	311440001.14314246
2000	367889999.1363286
2001	295030000.90457505
2002	272770001.4021249
2003	336400000.26859355
2004	399239994.60414064
2005	434150001.2800097
2006	446329999.2345273
2007	423900002.9843301
2008	470589993.84194624
2009	455609998.6229093
2010	473079995.0379879
2011	481959997.6986646
2012	466349997.68435967
2013	556530002.3965536
2014	545169995.2147901
2015	418019999.6307493
2016	464250000.58673316
2017	548270000.0274926
2018	596629996.1395559
2019	562400004.2360276
2020	572459997.9706107
2021	696830004.354939
2022	519330004.54492867