Year	Number of
1990	1260.34
1991	1291.08
1992	1311.32
1993	1367.69
1994	1428.68
1995	1475
1996	1529.36
1997	1586.99
1998	1625.27
1999	1681.53
2000	1729.87
2001	1823.42
2002	1903.3
2003	1985.83
2004	2059.28
2005	2139.41
2006	2233.49
2007	2321.93
2008	2438.13
2009	2575.42
2010	2689.93
2011	2781.65
2012	2843.88
2013	2888.24
2014	2937.81
2015	3019.65
2016	3103.18