Year	Number of
1990	276.42
1991	288.42
1992	298.85
1993	332.39
1994	354.57
1995	363.7
1996	377.84
1997	387.7
1998	411.98
1999	423.12
2000	444.4
2001	450.44
2002	455.44
2003	463.1
2004	490.94
2005	507.09
2006	526.13
2007	540
2008	541.7
2009	549.52
2010	566.6
2011	588.5
2012	607.04
2013	636.53
2014	655.94
2015	674.44
2016	694.42