Year	Number of
1990	637.2
1991	641.83
1992	654.19
1993	651.97
1994	650.23
1995	650.14
1996	640.37
1997	643.2
1998	646.65
1999	662.14
2000	668.45
2001	659.17
2002	640.31
2003	645.98
2004	656.79
2005	666.34
2006	662.12
2007	651.33
2008	677.61
2009	682.42
2010	669.98
2011	683.7
2012	689.86
2013	689.07
2014	687.46
2015	697.67
2016	707.6