Year	Number of
1990	2678.12
1991	2602.38
1992	2508.8
1993	2382.85
1994	2271.56
1995	2201.34
1996	2141.5
1997	2072.53
1998	2007.61
1999	1959.37
2000	1913.49
2001	1914.01
2002	1892.52
2003	1868.84
2004	1824.08
2005	1784.46
2006	1739.06
2007	1710.57
2008	1685.61
2009	1657.11
2010	1645.64
2011	1642.03
2012	1635.8
2013	1628.14
2014	1618.68
2015	1604.14
2016	1610.53