Year	Number of
1990	558.79
1991	574.88
1992	594.66
1993	619.37
1994	642.07
1995	670.18
1996	685.24
1997	703.3
1998	721.76
1999	732.09
2000	745.53
2001	767.92
2002	790.73
2003	814.83
2004	841.07
2005	866.42
2006	883.3
2007	910.79
2008	940.67
2009	976.64
2010	1013.12
2011	1042.85
2012	1071.53
2013	1104.53
2014	1141.06
2015	1181.08
2016	1227.15