Year	Number
1971	53953
1972	62618
1973	80797
1974	107233
1975	129875
1976	166122
1977	200063
1978	225286
1979	258343
1980	284826
1981	296197
1983	340703
1986	406332
2002	824538
2003	797992
2005	701536
2006	732614