Year	Number of
1980	16
1981	0
1982	16
1983	16
1984	10
1985	10
1986	24
1987	14
1988	10
1989	6
1990	41
1993	5
1995	8
1996	15
1997	18
1998	11
1999	21
2000	20
2001	19
2002	29
2003	10
2004	18
2005	14