Year	Number of
1990	542.55
1991	564.94
1992	587.76
1993	610.01
1994	631.81
1995	655.34
1996	649.61
1997	644.94
1998	640.86
1999	636.11
2000	630.77
2001	653.28
2002	679.07
2003	705.42
2004	730.11
2005	752.85
2006	758.97
2007	765.57
2008	771.93
2009	778.5
2010	785.09
2011	781.71
2012	779.22
2013	775.64
2014	774.72
2015	773.84
2016	773.1