Year	Number of
1990	870.43
1991	869.72
1992	881.13
1993	876.96
1994	859.33
1995	857.95
1996	847.2
1997	829.82
1998	816.5
1999	819.02
2000	841.3
2001	862.48
2002	871.24
2003	880.69
2004	900.62
2005	911.44
2006	905.5
2007	895.32
2008	889.5
2009	886.03
2010	886.05
2011	904.36
2012	901.79
2013	916.56
2014	933.55
2015	937.29
2016	940.98