Year	Number
1960	98870
1961	101406
1962	104963
1963	108928
1964	113023
1965	117263
1966	121680
1967	126284
1968	131077
1969	136059
1970	140735
1971	143732
1972	144798
1973	145232
1974	145716
1975	146275
1976	146786
1977	147169
1978	147518
1979	147876
1980	148798
1981	150857
1982	153508
1983	156131
1984	158663
1985	161137
1986	163604
1987	166085
1988	168584
1989	171266
1990	174630
1991	178805
1992	183516
1993	188520
1994	193566
1995	198511
1996	203394
1997	208271
1998	213102
1999	217865
2000	222518
2001	227001
2002	231264
2003	235308
2004	239155
2005	242873
2006	246494
2007	249996
2008	253369
2009	256599
2010	259594
2011	262614
2012	265726
2013	268717
2014	271704
2015	274677
2016	277736
2017	280983
2018	284085
2019	286974
2020	289745
2021	292344
2022	294911
2023	297646