Year	current US$
1976	752522814.7765667
1977	911263709.8194909
1978	1140627345.039772
1979	1353496167.1550329
1980	1247870330.7995062
1981	1261897499.0550036
1982	1108755535.7298884
1983	1094206488.869146
1984	1075408832.5259976
1985	1096520553.0742693
1986	1365476842.3652482
1987	1842180481.9719996
1988	2240408997.8028274
1989	2341806271.531886
1990	2844491127.13743
1991	2963774422.2768936
1992	3328871573.26433
1993	3460496327.4927363
1994	3869106037.7552414
1995	4138292572.2566776
1996	4452317427.8322
1997	4391723547.291864
1998	4204350261.434231
1999	4477752697.074479
2000	4669073555.448057
2001	4327842147.575472
2002	4677012128.696348
2003	5706278130.457261
2004	6698701431.78994
2005	6826006598.876541
2006	7481976116.677185
2007	8545025850.702326
2008	10996372312.667019
2009	10127222323.043324
2010	11415619599.537428
2011	12761883860.314672
2012	13067433141.035872
2013	13416670363.571539
2014	13904066529.210396
2015	12517949493.249508
2016	13015630038.509779
2017	14279956317.329037
2018	15604313027.48833
2019	15527442627.129416
2020	12368587915.098745
2021	12647445881.087597
2022	13776590537.828373
2023	15137464247.035244