Year	Number of
1990	614.03
1991	615.62
1992	580.35
1993	551.35
1994	540.63
1995	540.77
1996	568.01
1997	595.96
1998	633.26
1999	661.04
2000	662.47
2001	649.6
2002	634.47
2003	620.91
2004	607.29
2005	594.13
2006	596.57
2007	595.25
2008	601.9
2009	615.44
2010	635.19
2011	649.67
2012	663.47
2013	691.93
2014	718.6
2015	746.05
2016	774.9