Year	Number
1976	7764
1977	10139
1979	6937
1980	7822
1981	6741
1983	3799
1984	6353
1985	8535
1986	10177
1987	7129
1988	15252
1989	11224
1990	11512
1991	13552
1993	18010
1999	23945
2000	20492
2001	19740
2002	21098
2003	22257
2004	16596
2005	17015
2020	17978
2021	19824
2022	10459