Year	Number of
1990	1456.8
1991	1556.29
1992	1590.74
1993	1674.72
1994	1719.95
1995	1806.6
1996	1823.4
1997	1865.06
1998	1901.97
1999	2093.84
2000	1985.96
2001	1948.97
2002	1945.84
2003	2199.51
2004	2152.69
2005	2250.27
2006	2262.1
2007	2177.93
2008	2106.88
2009	2382.51
2010	2513.05
2011	2609.2
2012	2659.6
2013	2810.27
2014	2854.68
2015	2912.86
2016	2980.92