Year	current US$
1970	3499999.973922968
1971	4430000.036954879
1972	7060000.067576757
1973	16789999.725297086
1974	30929999.962449078
1975	28280000.489205115
1976	22639999.592676748
1977	55329999.748617396
1978	131610001.12444161
1979	210430003.63558528
1980	232570001.19611624
1981	225639999.75472686
1982	285069998.7802655
1983	256020002.79724598
1984	228900000.4641712
1985	285670000.50842756
1986	439300001.53183913
1987	585679996.3079392
1988	781929992.3852086
1989	853600002.6557597
1990	803519998.0512263
1991	820399996.5973201
1992	815549996.9124796
1993	910979991.8681383
1994	1153310002.008453
1995	1196460001.770407
1996	1101409998.0555468
1997	772209999.4085733
1998	867680005.883798
1999	927269992.6495552
2000	930390003.3831589
2001	912660005.6961178
2002	667229999.1063774
2003	667949996.5049326
2004	798160004.2153147
2005	1159750020.932406
2006	1104849993.759766
2007	1649439982.989802
2008	1202709993.3605638
2009	1567889992.0284753
2010	2314029970.3478813
2011	2146340004.5633316
2012	2300800024.7478476
2013	2301980019.8078165
2014	1467490012.615919
2015	1209230011.5227695
2016	1256279972.6426601
2017	1253840006.1428545
2018	1164490005.4633615
2019	1132200001.7166135
2020	1075010001.1825564
2021	1145029989.5405772
2022	1270400000.4082923