Year	Number
1960	29103
1961	30953
1962	32923
1963	35018
1964	37251
1965	39618
1966	42147
1967	47466
1968	53465
1969	60203
1970	67801
1971	76358
1972	80535
1973	84835
1974	89372
1975	94151
1976	99192
1977	104489
1978	110076
1979	115963
1980	122172
1981	128172
1982	134314
1983	140750
1984	147504
1985	154563
1986	161969
1987	169731
1988	177876
1989	186388
1990	195319
1991	200620
1992	205957
1993	211419
1994	217035
1995	222800
1996	228726
1997	234793
1998	241029
1999	247431
2000	254012
2001	259274.99999999997
2002	264620
2003	270075
2004	275651
2005	281326
2006	287126
2007	293045
2008	299095
2009	305252
2010	311545
2011	317968
2012	324532
2013	331232
2014	338069
2015	345048
2016	352171
2017	359441
2018	366862
2019	374517
2020	382516
2021	390986
2022	400051
2023	409831