Year	Number of
1990	1663.91
1991	1670.46
1992	1666.17
1993	1688.6
1994	1692.16
1995	1699.07
1996	1682.72
1997	1657.96
1998	1683.39
1999	1698.68
2000	1714.56
2001	1733.86
2002	1755.01
2003	1747.84
2004	1761.18
2005	1782.71
2006	1791.18
2007	1820.37
2008	1858.01
2009	1877.21
2010	1883.66
2011	1876.26
2012	1896.11
2013	1880.74
2014	1855.12
2015	1908.85
2016	1951.4