Year	Number
1971	9983
1972	11461
1973	14459
1974	17544
1975	20999
1976	22542
1977	23460
1978	26342
1979	26103
1980	26750
1981	29406
1982	30222
1983	32692
1984	36160
1985	39334
1986	44124
1987	44966
1988	48274
1989	47828
1994	59442
1995	65718
1996	80552
1997	84155
1999	86543
2001	100718
2002	105191
2019	205377