Year	Number
1971	112582
1972	112966
1973	112927
1977	128530
1978	129606
1981	119932
1982	116157
1983	115645
1986	100721
1987	120734
1988	126760
1989	130368
1990	121380
1991	135442
2005	224451
2006	229845
2007	212983
2008	187347
2009	190658
2010	186598
2011	197843
2012	190143
2017	114884