Year	Number of
1990	2415.4
1991	2479
1992	2600.72
1993	2726.59
1994	2827.79
1995	2878.21
1996	2887.1
1997	2875.8
1998	2861.37
1999	2852.31
2000	2822.04
2001	2768.33
2002	2780
2003	2809.89
2004	2825.66
2005	2836.16
2006	2833.66
2007	2859.02
2008	2940.22
2009	3063.33
2010	3141.87
2011	3173.92
2012	3159.4
2013	3121.3
2014	3084.35
2015	3109.78
2016	3131.91