Year	Number of
1990	1612.33
1991	1775.65
1992	1957.05
1993	2160.37
1994	2385.18
1995	2635.33
1996	2803.29
1997	2981.21
1998	3172.76
1999	3378.81
2000	3602.05
2001	3792.16
2002	3994.34
2003	4212.87
2004	4445.92
2005	4694.83
2006	5040.72
2007	5415.39
2008	5829.11
2009	6277.49
2010	6764.88
2011	7247.06
2012	7766.23
2013	8330.48
2014	8942.82
2015	9609.34
2016	10340.72