Year	Number
1960	78896
1961	79225
1962	79781
1963	80412
1964	81252
1965	82328
1966	83709
1967	85213
1968	86977
1969	89011
1970	91519
1971	94558
1972	97937
1973	101588
1974	105715
1975	110779
1976	116202
1977	121612
1978	126826
1979	131638
1980	135920
1981	137890
1982	137992
1983	137250
1984	137074
1985	138421
1986	141232
1987	145027
1988	148991
1989	152288
1990	154636
1991	156259
1992	157776
1993	159539
1994	161651
1995	164495
1996	166486
1997	167329
1998	167217
1999	165691
2000	162881
2001	158712
2002	153242
2003	146834
2004	139949
2005	132879
2006	125937
2007	119478
2008	113355
2009	108236
2010	103066
2011	98280
2012	92969
2013	88127
2014	84300
2015	80885
2016	77193
2017	74748
2018	72907
2019	71288
2020	69818
2021	68792
2022	67724