Year	Number
1971	225689
1972	225134
1973	220363
1974	211979
1975	202943
1976	199033
1977	190155
1978	181863
1979	171635
1980	166763
1981	167039
1982	167950
1983	169853
1984	166739
1985	168790
1986	168308
1987	176544
1988	182764
1989	186189
1990	189623
1991	193992
1992	196333
1993	197030
1994	195013
1995	191636
1996	186000
1997	181030
1998	176204
1999	172204
2000	168532
2001	155366
2002	141427
2003	141036
2004	137313
2005	129703
2007	130242
2008	130880
2009	130914
2010	131350
2019	133460
2020	136530
2021	130038
2022	129688