Year	Number of
1990	4000.22
1991	3869.05
1992	3758.93
1993	3678.8
1994	3583.78
1995	3582.64
1996	3489.6
1997	3356.44
1998	3300.15
1999	3244.45
2000	3166.33
2001	3094.92
2002	3046.45
2003	3016.42
2004	2883.59
2005	2859.13
2006	2794.94
2007	2780.08
2008	2798.17
2009	2787.83
2010	2798.42
2011	2805.52
2012	2831.14
2013	2820.64
2014	2790.53
2015	2814.36
2016	2841.25