Year	Total
1985	33175000000
1986	36282000000
1987	37453000000
1988	38150000000
1989	38489000000.00001
1990	39526000000
1991	38735000000
1992	37595000000
1993	33369000000
1994	31397000000
1995	24918000000
1996	23728000000
1997	26100000000
1998	23500000000
1999	26500000000
2000	26100000000
2001	25042000000
2002	26455000000
2003	26627000000
2004	31211000000
2005	30961000000
2006	31811000000
2007	31829000000
2008	35054000000
2009	30405000000
2010	34890000000
2011	32203000000
2012	30794000000
2013	31507000000
2014	34736999999.99999
2015	34082000000
2016	33100000000