Year	Number of
1990	784.58
1991	800.63
1992	876.79
1993	873.25
1994	909.84
1995	842.16
1996	827.74
1997	815.52
1998	820.83
1999	835.44
2000	837.29
2001	824.42
2002	839.45
2003	877.57
2004	888.1
2005	905.42
2006	924.11
2007	939.6
2008	977.26
2009	975.09
2010	992.27
2011	977.3
2012	988.14
2013	1010.16
2014	1037.27
2015	1073.26
2016	1089.16