Year	Number of
1990	10382.46
1991	10554.55
1992	10676.33
1993	10880.55
1994	11042.87
1995	11153.85
1996	11332.99
1997	11433.01
1998	11587.75
1999	11646.51
2000	11693.54
2001	11701.83
2002	11757.43
2003	12033.74
2004	11886.25
2005	12098.4
2006	12402.41
2007	12568.5
2008	12672.98
2009	12798.44
2010	12704.54
2011	12727.59
2012	12810.07
2013	12769.47
2014	12889.23
2015	13011
2016	13128.68