Year	Number of
1990	1942.91
1991	1893.81
1992	1853.59
1993	1884.5
1994	1957.51
1995	2045.4
1996	2074.26
1997	2084.85
1998	2083.02
1999	2127.6
2000	2147.92
2001	2173.03
2002	2218.93
2003	2254.42
2004	2279.61
2005	2285.54
2006	2303.92
2007	2299.15
2008	2322.1
2009	2417
2010	2484.14
2011	2495.81
2012	2529.24
2013	2571.61
2014	2594.31
2015	2681.5
2016	2778.8