Year	Number
1960	13106
1961	13414
1962	13759
1963	14119
1964	14504
1965	14898
1966	15305
1967	15757
1968	16238
1969	16723
1970	17197
1971	17566
1972	17858
1973	18169
1974	18488
1975	18810
1976	19128
1977	19446
1978	19777
1979	20115
1980	20434
1981	20736
1982	21054
1983	21391
1984	21728
1985	22066
1986	22412
1987	22766
1988	23137
1989	23518
1990	23896
1991	24262
1992	24630
1993	25015
1994	25403
1995	25799
1996	26232
1997	26689
1998	27136
1999	27588
2000	28029
2001	28382
2002	28671
2003	28951
2004	29225
2005	29503
2006	29766
2007	30008
2008	30242
2009	30495
2010	30730
2011	30974
2012	31260
2013	31530
2014	31786
2015	32012
2016	32230
2017	32465
2018	32707
2019	32952
2020	33169
2021	33390
2022	33610
2023	33798