Year	Number of
1990	1164.21
1991	1205.83
1992	1252.7
1993	1307.45
1994	1349.38
1995	1395.02
1996	1444.93
1997	1491.74
1998	1526.5
1999	1514.07
2000	1513.93
2001	1501.98
2002	1497.74
2003	1499.7
2004	1512.54
2005	1536.63
2006	1563.74
2007	1594.82
2008	1629.89
2009	1663.88
2010	1700.81
2011	1752.55
2012	1800.12
2013	1850.89
2014	1899.25
2015	1953.28
2016	2010.64