Year	Number of
1990	5590.17
1991	5657.26
1992	6112.65
1993	6343.3
1994	6632.08
1995	6950.47
1996	7052.82
1997	7087.88
1998	6843
1999	6591.43
2000	6649.6
2001	6976.06
2002	7123.03
2003	7182.56
2004	7133.99
2005	7160.88
2006	7194.78
2007	7324.43
2008	7758.8
2009	7895.62
2010	7979.66
2011	7453.97
2012	7515.14
2013	7460.4
2014	7638.11
2015	7491.31
2016	7359.55