Year	current US$
1977	259238642.29510328
1978	291989208.0718099
1979	439107943.1579545
1980	446390181.0958814
1981	442559041.7652683
1982	500850175.1344255
1983	648596725.8287246
1984	569092231.7178862
1985	510561279.2871632
1986	520169136.4894605
1987	527038381.7694752
1988	447862130.374261
1989	476174308.09822774
1990	479597655.9701778
1991	374765703.7683627
2005	2465999999.9998817
2006	2512000000.000118
2007	2786733276.521399
2008	3412420653.6294427
2009	2744716107.261121
2010	3441921707.4548516
2011	3527066210.645448
2012	3570235657.682028
2013	3701085660.402981
2014	3476763489.453117
2015	3394622098.5864835
2016	3142093127.081775
2017	3023719121.658475
2018	3224527046.841185
2019	3067328898.935296
2020	2936841619.912416
2021	3160065960.188548
2022	3487686684.80704
2023	3747435924.2493505