Year	Number
1971	130484
1972	130671
1973	131580
1974	132023
1976	130240
1977	140394
1978	138144
1979	137312
1980	132075
1981	130832
1982	130003
1983	126372
1984	121869
1985	117211
1986	113857
1987	112581
1988	114700
1989	118015
1991	104241
1992	100116
1993	98134
1994	98132
1995	99664
1996	100252
1997	102000
1999	107207
2000	108909
2001	109292
2003	110828
2005	116756
2007	109243
2008	107456
2009	100760
2010	99241
2011	98662
2012	94488
2013	84988
2014	81996
2015	81315
2016	79556
2018	81186
2019	81529
2020	90351
2021	91399