Year	Number
1960	138277
1961	140171
1962	142221
1963	144641
1964	147725
1965	151485
1966	155836
1967	160805
1968	166305
1969	172147
1970	178187
1971	184416
1972	190989
1973	197990
1974	205431
1975	213314
1976	221559
1977	230094
1978	238909
1979	248020
1980	257272
1981	266380
1982	275197
1983	283452
1984	290865
1985	297427
1986	303198
1987	308346
1988	313127
1989	317790
1990	322540
1991	327326
1992	331817
1993	335869
1994	339316
1995	342003
1996	344041
1997	346072
1998	348699
1999	351767
2000	355195
2001	359058
2002	363465
2003	368574
2004	374614
2005	382469
2006	392258
2007	402927
2008	413652
2009	423793
2010	432826
2011	441343
2012	449685
2013	458801
2014	468536
2015	478575
2016	489397
2017	500348
2018	511369
2019	522200
2020	529726
2021	533918
2022	538006
2023	544149