Year	Number of
1990	462.61
1991	484.11
1992	502.33
1993	528.58
1994	562.4
1995	647.04
1996	689.9
1997	729.73
1998	774.87
1999	789.41
2000	808.09
2001	819.05
2002	829.3
2003	842.87
2004	840.96
2005	850.27
2006	857.86
2007	869.42
2008	874.92
2009	889.77
2010	896.13
2011	897.04
2012	905.41
2013	915.99
2014	910.48
2015	929.94
2016	952.52