Year	Number of
1990	1364.49
1991	1392.26
1992	1439.61
1993	1491.7
1994	1552.86
1995	1614.76
1996	1663.36
1997	1691.88
1998	1723.17
1999	1764.26
2000	1798.14
2001	1810.53
2002	1827.64
2003	1849.58
2004	1865.38
2005	1866.41
2006	1872.9
2007	1884.07
2008	1874.98
2009	1886.95
2010	1912
2011	1911.39
2012	1903.7
2013	1889.56
2014	1885.46
2015	1878.61
2016	1864.84