Year	Number of
1990	5252.75
1991	5612.11
1992	5952.81
1993	6107.44
1994	6336.87
1995	6683.47
1996	6566.32
1997	6320.75
1998	6065.83
1999	6298.03
2000	6497.31
2001	6458.61
2002	6478.49
2003	6531.21
2004	6665.85
2005	6846.07
2006	6644.28
2007	6884.33
2008	6958.78
2009	6353.36
2010	6161.75
2011	6056.48
2012	6232.27
2013	6240.65
2014	6107.26
2015	6199.78
2016	6326.28