Year	Number of
1990	2644.38
1991	2651.01
1992	2667.99
1993	2696.45
1994	2686.53
1995	2705.19
1996	2716.6
1997	2711.19
1998	2716.2
1999	2714.76
2000	2700.42
2001	2685
2002	2720.45
2003	2742.96
2004	2754.67
2005	2788.96
2006	2823.11
2007	2860.03
2008	2910.25
2009	2965.86
2010	2989.23
2011	3041.99
2012	3095.18
2013	3143.07
2014	3156.6
2015	3185.61
2016	3227.59