Year	Number of
1990	1641.19
1991	1669.98
1992	1690.85
1993	1726.91
1994	1774.99
1995	1788.06
1996	1786.48
1997	1775.7
1998	1789.25
1999	1818.88
2000	1828.87
2001	1846.43
2002	1882.11
2003	1891.01
2004	1891.42
2005	1874.63
2006	1850.97
2007	1816.37
2008	1784.64
2009	1775.49
2010	1775.49
2011	1752.05
2012	1728.59
2013	1700.5
2014	1656.58
2015	1636.07
2016	1651.51