Year	Number of
1990	1584.5
1991	1638.34
1992	1675.53
1993	1773.81
1994	1855.87
1995	1895.19
1996	2012.26
1997	2117.42
1998	2181.62
1999	2242.17
2000	2272.95
2001	2422.08
2002	2510.69
2003	2601.52
2004	2670.92
2005	2756.6
2006	2826.97
2007	2845.87
2008	2929.15
2009	3024.81
2010	3092.71
2011	3034.77
2012	3128.47
2013	3058.45
2014	3134.65
2015	3191.72
2016	3231.38