Year	Number of
1990	605.34
1991	634.67
1992	665.4
1993	698.09
1994	740.24
1995	763.62
1996	770.96
1997	773.33
1998	788.4
1999	796.26
2000	793.18
2001	802.82
2002	810.34
2003	799.9
2004	800.09
2005	799.46
2006	820.88
2007	835.77
2008	846.1
2009	864.94
2010	883.19
2011	900.69
2012	922.5
2013	945.45
2014	966.92
2015	991.69
2016	1013.94