Year	Number of
1990	27221.41
1991	27505.16
1992	27699.49
1993	28129.34
1994	28449.72
1995	28369.67
1996	28579.22
1997	28297.94
1998	28408.91
1999	28283
2000	27931.19
2001	27284.99
2002	27102.78
2003	27560.84
2004	26512.27
2005	26362.06
2006	26640.47
2007	26623.91
2008	26559.52
2009	26899.04
2010	26820.62
2011	26612.27
2012	26427.15
2013	25789.76
2014	25997.66
2015	26268.75
2016	26576.96