Year	Number
1980	51
1981	41
1982	49
1983	37
1984	26
1985	35
1986	39
1987	53
1988	33
1989	34
1990	33
1991	21
1992	12
1993	15
1994	12
1995	33
1996	30
1997	26
1998	18
2000	17
2016	1