Year	US Dollars adjusted for inflation)
1976	2124319853.53771
1977	2263412225.01148
1978	2350119158.26636
1979	2432761703.55797
1980	2187995259.98154
1981	2316700862.63089
1982	2444051668.04727
1983	2453431823.73794
1984	2568703514.36593
1985	2747343369.95732
1986	3014990476.5072
1987	3283054480.52584
1988	3506018094.24681
1989	3662567012.45245
1990	3925786062.71037
1991	4099912192.56849
1992	4366927116.6933
1993	4588857101.12914
1994	4778658788.74408
1995	4983555093.47016
1996	5262028369.81099
1997	5561305046.51002
1998	5898911194.30263
1999	6052918760.07908
2000	6599292378.29694
2001	6769129806.19261
2002	6912182726.03343
2003	7164951322.26938
2004	7576632768.63496
2005	7670688143.62866
2006	8325631104.68563
2007	8802441342.01384
2008	9276625562.3588
2009	9584152841.68915
2010	10003670690.3497
2011	10411574171.5084
2012	10775575125.3493
2013	11137678209.4982
2014	11554736859.9332
2015	11955531873.1569
2016	12409842083.119
2017	12881416082.2775