Year	Number of
1990	1768.88
1991	1848.05
1992	1934.1
1993	2023.91
1994	2138.23
1995	2279.43
1996	2406.41
1997	2542.35
1998	2676.36
1999	2805.74
2000	2932.14
2001	3058.95
2002	3175.51
2003	3286.05
2004	3387.56
2005	3485.4
2006	3566.84
2007	3647.98
2008	3732.53
2009	3821.66
2010	3898.26
2011	3965.25
2012	4031.25
2013	4101.51
2014	4166.17
2015	4227.53
2016	4299.68