Year	Number of
1990	354.52
1991	367.85
1992	382.26
1993	396.96
1994	412.68
1995	429.56
1996	448.83
1997	469.5
1998	491.3
1999	514.52
2000	539.33
2001	558.04
2002	578.57
2003	600.54
2004	622.87
2005	645.23
2006	668.09
2007	690.8
2008	715.06
2009	740.73
2010	768.42
2011	787.1
2012	807.61
2013	829.24
2014	851.14
2015	872.82
2016	897.82