Year	Number of
1990	2249.44
1991	2284.64
1992	2325.51
1993	2385.32
1994	2389.96
1995	2416.25
1996	2451.23
1997	2475.78
1998	2513.63
1999	2578.02
2000	2601.98
2001	2675.69
2002	2722.95
2003	2761.96
2004	2749.18
2005	2743.71
2006	2772.18
2007	2780.38
2008	2813.82
2009	2832.01
2010	2875.53
2011	2918.02
2012	2936.19
2013	2872.99
2014	2841.06
2015	2855.6
2016	2895.55