Year	Number
1960	138318
1961	138491
1962	138152
1963	138235
1964	138997
1965	140184
1966	142432
1967	145547
1968	149145
1969	152339
1970	154600
1971	156443
1972	158008
1973	159373
1974	161455
1975	163898
1976	166663
1977	169863
1978	172868
1979	175039
1980	175964
1981	175768
1982	174469
1983	172705
1984	173145
1985	176510
1986	181029
1987	186466
1988	193492
1989	202062
1990	208663
1991	214153
1992	219925
1993	223524
1994	227074
1995	232346
1996	237054
1997	240657
1998	243712
1999	245934
2000	247874
2001	251010
2002	255617
2003	261099
2004	266304
2005	269356
2006	269513
2007	264995
2008	255038
2009	242106
2010	229491
2011	220919
2012	218247
2013	219384
2014	222933
2015	229092
2016	236831
2017	245633
2018	255986
2019	268399
2020	280829
2021	297031
2022	316808
2023	336965