Year	Number
1993	13749
1994	13605
1995	13919
1996	14941
1997	14573
1998	15961
1999	16780
2000	16888
2001	17100
2002	16949
2003	15845
2004	16456
2005	16173
2006	16405
2007	16179
2008	15790
2009	15501
2010	15251
2011	15047
2012	14915
2013	14657
2014	14369
2015	14036
2016	15351