Year	Number of
1990	1430.66
1991	1507.5
1992	1589.15
1993	1672.38
1994	1749.42
1995	1846.52
1996	1939.45
1997	2002.64
1998	2077.46
1999	2176.21
2000	2284.6
2001	2373.33
2002	2465.45
2003	2556.25
2004	2658.71
2005	2755.41
2006	2854.01
2007	2963.71
2008	3072.01
2009	3156.85
2010	3242.67
2011	3230.85
2012	3224.67
2013	3211.91
2014	3211.39
2015	3189.61
2016	3127.3