Year	Number of
1990	2830.39
1991	2922.64
1992	2876.59
1993	2829.59
1994	2840.76
1995	2849.34
1996	2843.82
1997	2918.39
1998	2884.98
1999	2887.95
2000	2846.82
2001	2776.02
2002	2712.24
2003	2681.12
2004	2661.24
2005	2660.52
2006	2662
2007	2652.5
2008	2583.61
2009	2550.41
2010	2426.4
2011	2392.74
2012	2390.77
2013	2336
2014	2261.05
2015	2221.13
2016	2189.32