Year	Number of
1990	6652.36
1991	6886.17
1992	7145.78
1993	7430.05
1994	7706.6
1995	8057.95
1996	8362.05
1997	8715.74
1998	9063.32
1999	9412.96
2000	9662.41
2001	9932.45
2002	10151.02
2003	10434.94
2004	10785.17
2005	11105.53
2006	11338.07
2007	11513.93
2008	11683.34
2009	11774.67
2010	11915.53
2011	11916.79
2012	12036.72
2013	12054.27
2014	11672.79
2015	11586.66
2016	11532.92