Year	Number of
1990	17130.25
1991	17081.46
1992	17013.87
1993	17024.31
1994	16887.95
1995	16761.02
1996	16592.76
1997	16207.81
1998	15907.96
1999	15654.17
2000	15459.54
2001	15233.72
2002	15020.15
2003	14735.64
2004	14428.47
2005	14302.1
2006	14133.19
2007	13929.58
2008	13805.17
2009	13706.1
2010	13644.28
2011	13674.51
2012	13698.38
2013	13716.78
2014	13682.58
2015	13894.1
2016	14102.29