Year	Number
1976	10000
1977	235000
1978	141550
1979	66000
1980	75000
1981	91700
1982	96280
1983	96280
1984	92260
1985	91520
1986	92250
1987	91210
1988	90350
1989	12899
1990	11557
1991	11022
1992	11002
1993	10873
1994	10684
1995	10878
1996	9379
1997	9361
1998	10603
1999	13068
2000	12086
2001	12245
2002	12249
2003	13375
2004	13963
2005	13978
2006	13086
2007	12064
2008	12704
2009	14722
2010	15142
2011	16212
2012	23401
2013	23771
2014	15468
2015	15547
2016	15547
2017	41119
2018	39856
2019	25793
2020	25791
2021	26045
2022	25514
2023	25174