Year	Number of
1990	1754.87
1991	1764.15
1992	1764.34
1993	1764.29
1994	1770.11
1995	1799.32
1996	1738.54
1997	1723.87
1998	1683.17
1999	1630.11
2000	1618.79
2001	1576.35
2002	1542.34
2003	1542.3
2004	1549.27
2005	1563.33
2006	1582.65
2007	1587.08
2008	1609.15
2009	1647.07
2010	1684.35
2011	1705.35
2012	1728.64
2013	1756.89
2014	1790.78
2015	1823.56
2016	1862.47