Year	Number of
1990	2407.26
1991	2450.14
1992	2490.31
1993	2542.51
1994	2608.82
1995	2632.53
1996	2648.14
1997	2659.4
1998	2653.07
1999	2640.2
2000	2648.51
2001	2676.65
2002	2708.68
2003	2710.31
2004	2713.56
2005	2715.97
2006	2737.79
2007	2771.75
2008	2810.76
2009	2839.79
2010	2876.98
2011	2916.23
2012	2948.32
2013	2979.69
2014	3051.71
2015	3130.14
2016	3201.95