Year	Number
1970	138048
1971	140214
1972	141978
1973	143218
1974	144504
1975	145739
1976	146831
1977	147803
1978	148899
1979	151981
1980	156189
1981	159195
1982	161509
1983	164332
1984	167830
1985	172308
1986	176903
1987	181018
1988	184575
1989	187710
1990	190791
1991	194993
1992	199545
1993	202989
1994	207934
1995	219773
1996	228624
1997	227046
1998	223421
1999	223301
2000	225516
2001	227113
2002	228513
2003	229783
2004	230192
2005	230714
2006	232642
2007	234557
2008	236065
2009	238023
2010	239595
2011	241436
2012	243139
2013	243022
2014	242947
2015	243593
2016	243953
2017	245180
2018	245675
2019	245575
2020	244273
2021	243809
2022	243207