Year	Number of
1990	9766.88
1991	9946.13
1992	10109.12
1993	10259.32
1994	10315.02
1995	10437.79
1996	10542.01
1997	10550.1
1998	10828.85
1999	11116.69
2000	11301.48
2001	11516.27
2002	11692.46
2003	11805.76
2004	11724.29
2005	11565.59
2006	11551.86
2007	11506.72
2008	11364.48
2009	11237.64
2010	11195.03
2011	11223.57
2012	11360.53
2013	11525.46
2014	11900.24
2015	12332.13
2016	12761.35