Year	Number
1971	42713
1972	51143
1973	67952
1974	84507
1976	197706
1977	229030
1978	228544
1979	263751
1980	271139
1981	212395
1982	194181
1983	182272
1984	183836
1985	166333
1986	153711
2007	457132
2021	250453
2023	464607