Year	Total
1985	20962000000
1986	22416000000
1987	22755000000
1988	26000000000
1989	29158000000
1990	28405000000
1991	29363000000
1992	18707000000
1993	14105000000
1994	9998000000
1995	13840000000
1996	16789000000
1997	14861000000
1998	17630000000
1999	13535000000
2000	11425000000
2001	14737000000
2002	17721000000
2003	19488000000
2004	19274000000
2005	14784000000
2006	12482000000
2007	14008000000
2008	14010000000
2009	15358000000
2010	5748600000
2011	4821600000
2012	5042400000
2013	4761500000
2014	4396900000
2015	4932900000
2016	4280000000