Year	current US$
1976	1164013760.5875044
1977	1145246443.0654826
1978	1408315433.565385
1979	1971401586.8883736
1980	2214813030.997681
1981	2103668529.5771778
1982	1839383286.856904
1983	2226832082.250885
1984	2122335023.105588
1985	1990662689.998929
1986	1739357041.8991275
1987	2218877827.307431
1988	2297494402.7647667
1989	2309966932.132631
1990	2880203984.819735
1991	2907175674.9290304
1992	3387819968.713488
1993	2861791380.8885303
1994	3303629728.982851
1995	3666238025.330565
1996	4427536771.197946
1997	4496214636.53854
1998	4771915958.63795
1999	5222365065.649434
2000	4761056878.180227
2001	4862957689.115561
2002	4689980225.744284
2003	5566265729.921984
2004	6580664488.771983
2005	6521107111.194141
2006	7274919704.7388315
2007	8071748457.780212
2008	9516111487.762148
2009	9107404047.323692
2010	9901192818.219925
2011	7938892547.356662
2012	7990692388.756885
2013	7247942674.613701
2014	7475663775.45761
2015	5926209137.832152
2016	5174408135.729023
2017	4622461948.603494
2018	4559392440.488667
2019	4295869140.407326
2020	2388054801.746578
2021	4039965103.886015
2022	2830938428.981538