Year	Number of
1990	784.34
1991	807.65
1992	824.3
1993	834.35
1994	841.98
1995	842.9
1996	849.71
1997	872.5
1998	891.25
1999	908.67
2000	907.75
2001	903.5
2002	892.91
2003	899.5
2004	907.06
2005	922.12
2006	924.77
2007	934.26
2008	937.12
2009	940.88
2010	957.72
2011	958.13
2012	970.46
2013	976.68
2014	984.17
2015	977.48
2016	981.25