Year	Number of
1990	1583.54
1991	1626.65
1992	1670.09
1993	1723.8
1994	1778.47
1995	1846.24
1996	1864.96
1997	1893.14
1998	1925.93
1999	1999.15
2000	2051.16
2001	2088.06
2002	2113.6
2003	2222.99
2004	2331.16
2005	2457.91
2006	2517.62
2007	2570.56
2008	2583.42
2009	2665.43
2010	2736.63
2011	2876.29
2012	3014.83
2013	3123.7
2014	3231.43
2015	3345.83
2016	3464.47