Year	Number of
1990	4422.99
1991	4539.28
1992	4562.63
1993	4686.08
1994	4770.73
1995	4830.04
1996	4755.84
1997	4770.7
1998	4662.31
1999	4817.16
2000	4546.28
2001	4449.21
2002	4296.27
2003	4343.74
2004	4229.08
2005	4201.33
2006	4110.33
2007	3862.37
2008	3667.85
2009	4044.18
2010	4100.89
2011	4156.99
2012	4120.02
2013	4288.23
2014	4307.24
2015	4355.95
2016	4439.34