Year	current US$
1970	166442316.83388
1971	162144222.942308
1972	179278846.365385
1973	205098681.254759
1974	219169475.055338
1975	267889463.19059
1976	372704055.372277
1977	414130333.699345
1978	593191958.579131
1979	514200089.294723
1980	577620274.003243
1981	685891166.981356
1982	900699360.437563
1983	1033538482.54573
1984	1115456079.41826
1985	1245509867.20963
1986	1267307735.98896
1987	1390615728.72316
1988	1456509908.83968
1989	1569260279.8148
1990	2523692544.4024
1991	2514758910.94495
1992	2733627060.03125
1993	4259435117.56907
1994	4177983300.19881
1995	4316168844.72129
1996	4995918509.07755
1997	5099698064.35978
1998	4152016857.11107
1999	5071041082.99379
2000	5525945537.22344
2001	5601056889.30701
2002	5993974990.08217
2003	6516211282.53444
2004	7106777767.04374
2005	7473415070.36098
2006	8473451044.9742
2007	9662651185.25463
2008	10219537133.8174
2009	11036647311.7151
2010	11575201838.1041
2011	16750734128.9908
2012	13597394812.7691
2013	15277132109.8354
2014	15058505258.1132
2015	14832976858.7958
2016	15353410352.7432
2017	16988902407.0287
2018	18793150392.5589
2019	20416839264.3368
2020	19026973263.3423
2021	19040157908.7806