Year	Number
1971	44881
1972	40471
1973	29135
1974	17855
1976	38127
1977	91044
1979	66146
1980	82595
1981	88909
1982	71019
1983	66579
1985	62157
1986	29212
1987	31558
1988	32541
1989	30124
1990	9281
1991	108
1992	358
1993	1347
1994	5169
1995	4830
1996	2810
1997	3943
1999	4908
2000	137264
2001	138945
2002	140553
2003	149151
2004	148892
2005	3243
2006	1136
2007	5208
2008	20115
2009	36009
2010	51322
2011	9824
2012	14993
2013	23622
2014	56322
2015	21490
2016	7005
2017	2457
2018	618
2019	4882
2020	1690
2021	3961
2022	1333