Year	Number
1984	14613
1985	15161
1986	15720
1987	16296
1988	16662
1989	16135
1990	15835
1991	15560
1992	14576
1993	14479
1994	15444
1995	15835
1996	16496
1997	17035
1998	17740
1999	18519
2000	19347
2001	20222
2002	21142
2003	21911
2004	22706
2005	23431
2006	24078
2007	24457
2008	24920
2009	25076
2010	25115
2011	25200
2012	24801
2013	24932
2014	25171
2015	25432
2016	25759
2017	26014
2018	26183
2019	26366
2020	26557
2021	26593
2022	26641