Year	Total
1985	76989000
1986	76479000
1987	75778000
1988	71486000
1989	65210000
1990	75121000
1991	62485000
1992	64327000
1993	56497000
1994	46607000
1995	42444000
1996	33450000
1997	38221000
1998	37052000
1999	38647000
2000	39175000
2001	39829000
2002	39100000
2003	40453000
2004	39281000
2005	37521000
2006	39822000
2007	39759000
2008	41798000
2009	35870000
2010	38251000
2011	41490000
2012	42545000
2013	41625000
2014	35576000
2015	27344000
2016	31517000