Year	Number
1975	10494
1976	11022
1977	12358
1978	13300
1979	14331
1980	15203
1981	16174
1982	16553
1983	21117
1984	25838
1985	27643
1986	29903
1987	30999
1988	32056
1989	33897
1990	36673
1991	40531
1992	43522
1993	47230
1994	50643
1995	54150
1996	56844
1997	63888
1998	67308
1999	70846
2000	75308
2001	77366
2002	78680
2003	79815
2004	81709
2005	81056
2006	81500
2007	82000
2008	83000
2009	83747
2010	84957
2011	83985
2012	86449
2013	84941
2014	84900
2015	91916
2016	89030
2017	89030
2018	88098
2019	92756
2020	103240
2021	119977
2022	108250