Year	Number of
1990	10518.92
1991	10600.42
1992	10929.34
1993	11626.51
1994	11925.94
1995	11415.76
1996	10425.53
1997	9748.27
1998	9296.15
1999	9183.4
2000	9070.95
2001	9081.47
2002	9128.02
2003	9165.43
2004	9168.7
2005	9295.09
2006	9140.38
2007	9253.8
2008	9506.35
2009	9438.57
2010	9594.92
2011	9640.33
2012	9659.93
2013	9768.7
2014	9973.47
2015	10224.87
2016	10635.99