Year	Number of
1990	1469.71
1991	1525.62
1992	1574.26
1993	1644.51
1994	1700.33
1995	1788.87
1996	1877.74
1997	1926.31
1998	1967.12
1999	1985.58
2000	1991.87
2001	1978.29
2002	1975.2
2003	1971.93
2004	1964.18
2005	1974.5
2006	1986.34
2007	1994.14
2008	2008.85
2009	2013.3
2010	2034
2011	2055.06
2012	2082.32
2013	2098.4
2014	2123.24
2015	2196.31
2016	2255.54