Year	current US$
1972	27708109.399259523
1973	37840136.05442177
1974	57171514.5436309
1975	49485054.33537514
1976	52915678.316670395
1977	59989997.970763475
1978	68218914.03730063
1979	97348157.66013369
1980	167909232.7918952
1981	189843240.18635523
1982	184046118.6340495
1983	172862092.3366517
1984	172777298.2103532
1985	160460000.94545597
1986	141705605.95463678
1987	147391277.7767794
1988	167947044.69639382
1989	164989654.48478618
1990	209618219.7642107
1991	218515701.2616263
1992	259130562.48078957
1993	296825079.1393131
1994	399920276.0684192
1995	462690214.0403418
1996	503520398.1204355
1997	518079297.44397414
1998	449688899.6685598
1999	471096528.3780426
2000	415637468.85151327
2001	409615847.71461076
2002	338901817.98999876
2003	414238408.91965085
2004	470202654.8937412
2005	554484823.3164092
2006	603431795.010893
2007	661680959.226346
2008	720478833.2141399
2009	749697605.5494186
2010	854225748.1275035
2011	990047255.3017769
2012	1128048090.5829518
2013	1289722485.2731428
2014	1320294155.73102
2015	1283709265.1397927
2016	1336643909.5976136
2017	1440170145.003607
2018	1594890892.869605
2019	1602564673.521995
2020	1572050827.1043963
2021	1540747133.6331549
2022	1574657865.2689605
2023	1656421112.4293585