Year	Number of
1990	2076.29
1991	2122.07
1992	2183.6
1993	2265.51
1994	2383.35
1995	2487.68
1996	2526.79
1997	2585.99
1998	2628.85
1999	2696.47
2000	2746.96
2001	2739.48
2002	2758.18
2003	2779.82
2004	2834.64
2005	2916.47
2006	2987.86
2007	3048.8
2008	3075.87
2009	3153.43
2010	3300.65
2011	3409.82
2012	3499.49
2013	3590.62
2014	3761.91
2015	3922.84
2016	4049.01