Year	current US$
1970	263.8906466011786
1971	271.6800540710939
1972	280.4467996644013
1973	375.67816222619524
1974	529.8758407571044
1975	471.4099988979628
1976	544.9217717804044
1977	622.763004104205
1978	804.6211777229587
1979	849.8704171621057
1980	981.8001681020621
1981	1149.5405983344285
1982	1056.0902558197026
1983	1160.62527198687
1984	1438.3794304760631
1985	1236.331988354479
1986	998.0171739166605
1987	1053.1188364152154
1988	1221.8840992027651
1989	1252.5844918863843
1990	1465.1914902813396
1991	1706.2160749653613
1992	2003.2935579368552
1993	2288.1652492297017
1994	2528.186391757632
1995	2966.9222671352745
1996	3296.203456980661
1997	3187.008324802823
1998	2114.5854633634917
1999	2248.5310161531793
2000	2596.9523852461716
2001	2583.9801212840453
2002	2829.2001343117317
2003	2994.7860887546753
2004	3398.339354425258
2005	3816.4853164166107
2006	4307.262222227667
2007	5150.803311023296
2008	5912.478463208354
2009	5234.840667896047
2010	6393.204358178193
2011	7511.852833738011
2012	7702.292787397001
2013	7828.368414913027
2014	7915.030632399749
2015	7055.8904494378985
2016	6983.027839247231
2017	7170.6446429450125
2018	7789.8989303059625
2019	7991.165773069764
2020	7474.005395483819
2021	7867.55481345638