Year	current US$
1970	248029361.649687
1971	263435982.949523
1972	352770062.127985
1973	451506195.507365
1974	687200643.444814
1975	804491040.664768
1976	910955272.667025
1977	1035702597.50861
1978	1312793952.11128
1979	1513792897.72403
1980	1700062040.861
1981	2094659750.3429
1982	2137667379.59784
1983	2325211500.90069
1984	2573010477.38454
1985	2789377226.26914
1986	3066643949.24441
1987	3207527267.30037
1988	2799101384.98581
1989	2650598006.08014
1990	2956905919.45105
1991	1985727574.18705
1992	2383840591.77234
1993	2795346506.45523
1994	2162841288.62616
1995	1978715083.28316
1996	1952789428.41226
1997	2053016935.93912
1998	2063297026.41481
1999	2070574198.68994
2000	2326532097.93582
2001	2373810987.07883
2002	2436138915.40889
2003	2919092269.2576
2004	3651129572.92895
2005	4382593202.0364
2006	5025692515.05721
2007	5947715679.8118
2008	7579291097.18222
2009	6066708708.34826
2010	7181536096.0098
2011	8843683204.57557
2012	9220803680.5866
2013	9184568202.16368
2014	9330827852.42856
2015	7221992395.47679
2016	7079343624.77869
2017	7485187105.19705
2018	7616884245.14041
2019	7485596294.7591
2020	6346317873.05262
2021	7123299140.78215