Year	Number
1983	1
1984	3
1985	5
1987	6
1988	10
1990	1
1991	3
1992	5
1995	2
1998	3
1999	4
2000	4
2001	4
2002	13
2003	5
2011	11
2013	8
2015	7
2016	15
2017	4
2018	4