Year	Number of
1990	1565.62
1991	1581.5
1992	1598.26
1993	1617.32
1994	1606.05
1995	1618.59
1996	1646.82
1997	1671.64
1998	1703.54
1999	1714.95
2000	1748.79
2001	1761.97
2002	1800.8
2003	1814.21
2004	1829.36
2005	1846.74
2006	1864.61
2007	1877.64
2008	1889.79
2009	1907.61
2010	1928.18
2011	1959.01
2012	1990.68
2013	2031.72
2014	2073.39
2015	2124.13
2016	2187.62