Year	Number
1971	13744
1972	15208
1973	17912
1974	20144
1976	26611
1977	6308
1978	6981
1979	11130
1980	15338
1981	92441
1982	89558
1983	88381
1984	90535
1985	88039
1986	82538
2007	86929