Year	Number of
1990	1690.43
1991	1746.37
1992	1803.03
1993	1812.21
1994	1827.06
1995	1842.83
1996	1850.05
1997	1874.5
1998	1904
1999	1933.86
2000	1961.9
2001	1971.06
2002	1969.7
2003	1986.12
2004	2016.61
2005	2058.89
2006	2088.04
2007	2110.89
2008	2121.27
2009	2138.26
2010	2160.03
2011	2199.34
2012	2242.84
2013	2295.67
2014	2362.8
2015	2434.8
2016	2508.44