Year	US Dollars adjusted for inflation)
1992	2596000000
1993	3431000000
1994	1468000000
1995	3799000000
1996	3544000000
1997	3341000000
1998	2030000000
1999	4255000000
2000	4454000000
2001	5336000000
2002	5802000000
2003	5139000000
2004	6253000000
2005	5129000000
2006	5117000000
2007	5495000000
2008	5953000000
2009	5071000000
2010	6158000000
2011	8679000000
2012	8171000000
2013	7923000000
2014	5467000000
2015	5927000000
2016	6811000000
2017	6199000000
2018	7173000000
2019	5627000000
2020	3904000000
2021	2857000000
2022	2820000000