Year	Number
1960	158884
1961	160461
1962	162561
1963	164361
1964	166289
1965	168318
1966	169693
1967	170382
1968	170914
1969	171849
1970	172862
1971	174398
1972	176092
1973	177964
1974	180488
1975	182609
1976	183679
1977	184202
1978	184728
1979	185385
1980	186293
1981	187068
1982	187497
1983	187772
1984	187982
1985	188306
1986	189093
1987	190162
1988	191292
1989	192796
1990	194761
1991	196963
1992	199362
1993	201950
1994	204729
1995	207691
1996	210514
1997	213044
1998	215434
1999	218070
2000	221082
2001	223861
2002	226149
2003	228646
2004	231519
2005	234862
2006	238501
2007	242111
2008	246266
2009	250499
2010	254780
2011	260020
2012	265765
2013	271532
2014	277710
2015	283954
2016	289781
2017	296716
2018	302297
2019	308156
2020	313207
2021	317924
2022	324394
2023	332084