Year	Number of
1990	1613.43
1991	1647.22
1992	1680.06
1993	1748.04
1994	1824.45
1995	1893.25
1996	1960.11
1997	1964.69
1998	1988.95
1999	2019.28
2000	2055.71
2001	2078.68
2002	2099.24
2003	2143.78
2004	2181.88
2005	2211.38
2006	2233.24
2007	2251.19
2008	2266.74
2009	2281.61
2010	2302.86
2011	2316.78
2012	2338.67
2013	2363.17
2014	2389.37
2015	2418.65
2016	2447.5