Year	Number
1971	178018
1972	177524
1973	177128
1974	167805
1975	189265
1976	86173
1977	86512
1978	86722
1979	6867
1980	10934
1981	58178
1983	123724
1985	122590
1986	96920
1987	70618
1988	61430
1989	54957
1993	254668
1996	381584
1999	169227
2000	230175
2003	195175
2004	215648
2007	134623