Year	Number of
1990	35963.85
1991	36209.34
1992	36596.12
1993	36698.89
1994	36745.41
1995	36925.67
1996	36941.01
1997	36695.45
1998	36523.8
1999	36366.6
2000	36071.3
2001	35635.9
2002	35489.79
2003	35464.73
2004	35461.86
2005	35658.4
2006	35858.12
2007	36165.45
2008	36523.89
2009	36815.82
2010	37127.04
2011	37680.88
2012	38399.17
2013	39145.58
2014	39584.2
2015	40287.78
2016	41104.25