Year	Number of
1990	6531.09
1991	6525.97
1992	6764.41
1993	6551.48
1994	6729.49
1995	6512.24
1996	6734.22
1997	7332.41
1998	7611.25
1999	8115.51
2000	8966.38
2001	9117.02
2002	9509.39
2003	9909.28
2004	10190.69
2005	10420.82
2006	10536.87
2007	10263.85
2008	9918.94
2009	9759.25
2010	9770.69
2011	9635.71
2012	9497.87
2013	9767.62
2014	10315.12
2015	10685.88
2016	10904.24