Year	Number of
1990	1601.38
1991	1654.39
1992	1704.97
1993	1760.58
1994	1820.01
1995	1876.75
1996	1929.86
1997	1969.1
1998	2038.1
1999	2095.47
2000	2146.72
2001	2208.39
2002	2282.25
2003	2362.37
2004	2450.85
2005	2536.26
2006	2632.19
2007	2740.54
2008	2843.46
2009	2959.38
2010	3085.59
2011	3181.78
2012	3268.04
2013	3365.75
2014	3457.52
2015	3533.03
2016	3612.06