Year	Number of
1990	825.66
1991	867.32
1992	903.32
1993	945.15
1994	981.77
1995	1014
1996	1058.68
1997	1083.63
1998	1124.87
1999	1177.56
2000	1215.94
2001	1267.39
2002	1302.32
2003	1369.58
2004	1422.67
2005	1477.97
2006	1548.96
2007	1568.31
2008	1623.3
2009	1696.68
2010	1786.09
2011	1798.01
2012	1839.57
2013	1862.85
2014	1904.1
2015	1959.59
2016	2012.93