Year	Number
1971	248296
1973	258444
1974	253419
1975	265154
1976	265712
1977	231162
1978	209278
1979	171790
1980	191860
1994	192300
1995	182888
1996	161641
1997	115073
1998	102969
1999	102171
2000	88487
2001	63203
2002	37447
2003	32167
2005	47064
2006	27199
2007	14214
2008	35232
2009	15196
2010	12166
2011	14463
2012	20595
2013	18345
2014	18014
2015	16736
2016	18185
2017	19486
2018	22868
2019	25908
2020	29634
2021	56914
2022	70043