Year	Number of
1990	15745.77
1991	15769.51
1992	15737.02
1993	15739.27
1994	15540.29
1995	15391.56
1996	15166.27
1997	14973.13
1998	14801.96
1999	14670.99
2000	14420.05
2001	14372.68
2002	14256.14
2003	14067.81
2004	13791.88
2005	13617.39
2006	13411.62
2007	13222.29
2008	13097.45
2009	12901.85
2010	12877.62
2011	12917.77
2012	13067.17
2013	13181.86
2014	13254.41
2015	13288.83
2016	13366.65