Year	Total
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	137900
1994	1269000
1995	1103000
1996	1233000
1997	1240000
1998	1212000
1999	1285000
2000	1439000
2001	1502000
2002	2161000
2003	3727000
2004	4340000
2005	4565000
2006	4716000
2007	5342000
2008	5881000
2009	6030000
2010	6353000