Year	current US$
1977	9680866787.255907
1978	10785855720.092415
1979	12144107449.394495
1980	16587805072.043665
1981	16593861590.439001
1982	14417402196.923212
1983	13004453161.619474
1984	11972726888.059746
1985	12947375716.436926
1986	12221546939.699617
1987	13070651205.512764
1988	13706472335.166302
1989	15166982942.000132
1990	17435286439.17576
1991	19106902316.583073
1992	19469604373.79025
1993	21823378993.12097
1994	22637677001.1608
1995	22871894151.58882
1996	24883898085.32273
1997	24578990751.046795
1998	24220557130.12936
1999	26602454771.925426
2000	27357253106.873226
2001	29577971852.46692
2002	30375916706.757614
2003	34857616752.04699
2004	42270954808.99451
2005	49969340879.4474
2006	62841615315.622536
2007	75453775006.09924
2008	91689977698.44144
2009	78317856955.61974
2010	91795058826.88838
2011	107040471268.75177
2012	111291656911.23976
2013	115111306856.64804
2014	122767536970.32634
2015	114559258893.52396
2016	106660439334.73167
2017	123124448932.21951
2018	148654168345.83478
2019	157209032872.87225
2020	119074970865.17822
2021	132676170418.97205
2022	156181073213.9853