Year	Number of
1990	1903.25
1991	1898.75
1992	1894.46
1993	1875.14
1994	1856.32
1995	1829.77
1996	1799.51
1997	1746.82
1998	1748.15
1999	1718.19
2000	1691.34
2001	1708.98
2002	1711.72
2003	1691.96
2004	1670.16
2005	1665.72
2006	1671.4
2007	1689.32
2008	1702.65
2009	1713.28
2010	1703.73
2011	1720.15
2012	1736
2013	1733.69
2014	1713.5
2015	1751.06
2016	1773.17