Year	Number of
1990	1369.07
1991	1408.99
1992	1482.51
1993	1569.52
1994	1629.31
1995	1664.66
1996	1734.41
1997	1788.39
1998	1837.32
1999	1894.39
2000	1903.85
2001	1882.58
2002	1875.47
2003	1878.97
2004	1877.5
2005	1880.91
2006	1871.15
2007	1912.66
2008	1959.01
2009	2045.18
2010	2117.58
2011	2158.3
2012	2174.14
2013	2166.93
2014	2158.33
2015	2183.24
2016	2217.21