Year	current US$
1976	18761274.34
1977	78875038.15
1978	115435371.4
1979	171138702.4
1980	338666748
1981	381052154.5
1982	526463684.1
1983	642408508.3
1984	500747406
1985	502471374.5
1986	576282470.7
1987	747808898.9
1988	763622131.3
1989	757979553.2
1990	778865600.6
1991	769365722.7
1992	911759948.7
1993	1007375061
1994	1150881226
1995	1201664266.51586
1996	1344661208.65883
1997	1526499543.77216
1998	1605786652.44555
1999	1806794191.65168
2000	1967528858.46792
2001	2104551469.14176
2002	2858057770.42652
2003	3191664732.05594
2004	3583817227.52373
2005	4314502845.76468
2006	5427515428.7338
2007	6562316321.90849
2008	8940611606.37691
2009	10520653005.6389
2010	10850211617.3056
2011	12071073184.1576
2012	14119627033.9854
2013	13866954019.3967
2014	14987531478.7427
2015	15295536094.8351
2016	13574285886.2473
2017	13501933032.7097
2018	15566241930.3078
2019	18363859531.2812
2020	21751646479.1935
2021	22205503377.12
2022	21505473781.2512
2023	23000000000