Year	Number of
1990	2533.33
1991	2589.64
1992	2644.63
1993	2698.19
1994	2754.3
1995	2818.37
1996	2871.4
1997	2922.49
1998	2974.53
1999	3023.68
2000	3069
2001	3098.46
2002	3127.51
2003	3159.69
2004	3198.56
2005	3242.99
2006	3239.79
2007	3234.59
2008	3230.53
2009	3230.88
2010	3238.37
2011	3271.75
2012	3303.48
2013	3337.96
2014	3380.37
2015	3424.44
2016	3468.77