Year	current US$
1971	879392455.102713
1972	1052643232.47448
1973	1405912380.08516
1974	1746209422.92196
1975	1989773183.69505
1976	2097395436.61652
1977	2550643843.75521
1978	3028766931.25208
1979	3443771670.83482
1980	3718081053.91334
1981	3845850413.34111
1982	3838026615.46118
1983	3689492590.74159
1984	3291131608.20622
1985	3850794865.30235
1986	4651457540.88414
1987	5860014375.49366
1988	6322246215.27362
1989	6204205884.21092
1990	6745992244.24921
1991	6634622417.24106
1992	6515348375.13505
1993	6998620887.66109
1994	8034189783.38116
1995	9175743888.23591
1996	10070764535.5925
1997	9429490009.05693
1998	8249381544.06895
1999	8370439563.39935
2000	7717033331.16976
2001	7754478484.6449
2002	9325250135.06303
2003	12025772563.4971
2004	14178823527.1636
2005	15955079916.7582
2006	16054730566.9233
2007	19153376942.5751
2008	20068180221.0905
2009	18716443380.0793
2010	21595524916.7626
2011	23943548643.8935
2012	25139278049.1268
2013	26230874391.4071
2014	27714514831.5091
2015	25068777348.7725
2016	26365012786.7803
2017	28235586687.2508
2018	31253928075.6148
2019	30884624892.2166
2020	31703306828.631
2021	37415668863.596