Year	Number
1971	1021511
1972	1014802
1973	955920
1974	968689
1975	955255
1976	941941
1977	923677
1978	902627
1979	878385
1980	861746
1981	842117
1982	821059
1983	780408
1984	758663
1985	739522
1986	730288
1987	727647
1988	728718
1989	727060
1990	722811
1991	719372
1992	711521
1993	739093
1994	736782
1995	738768
1996	742796
1999	762734
2000	773742
2001	771889
2002	767787
2003	761730
2004	747111
2005	738580
2006	732808
2007	732411
2008	733052
2009	731603
2010	731761
2011	736062
2012	744331
2013	764137
2014	773568
2015	782606
2016	797390
2017	814974
2018	821236
2019	823109
2020	823725
2021	818422