Year	Number of
1990	1830.62
1991	1960.93
1992	2100.31
1993	2251.72
1994	2416.87
1995	2598.77
1996	2750.78
1997	2917.21
1998	3105.43
1999	3308.67
2000	3527.48
2001	3746.93
2002	3987.62
2003	4261.94
2004	4554.88
2005	4867.35
2006	4986.74
2007	5102.79
2008	5230.44
2009	5368.23
2010	5521.33
2011	5781.29
2012	6061.08
2013	6355.84
2014	6665.87
2015	6989.93
2016	7327.95