Year	Total
1971	9.122
1972	9.122
1973	9.122
1974	4.107
1975	6.257
1976	7.928
1977	7.928
1978	8.167
1979	8.406
1980	6.257
1981	6.018
1982	6.018
1983	5.779
1984	6.615
1985	6.734
1986	6.734
1987	6.495
1988	6.018
1989	6.018
1990	6.137
1991	5.54
1992	5.492
1993	5.469
1994	11.7
1995	42.44
1996	43.15
1997	41.62
1998	42.96
1999	43.65
2000	44.25
2001	44.46
2002	44.73
2003	48.09
2004	50.08
2005	51.02
2006	51.55
2007	73.12
2008	82.87
2009	84.62