Year	Number of
1990	615.7
1991	632.98
1992	641.15
1993	654.06
1994	662.81
1995	682.71
1996	690.53
1997	720.7
1998	734.74
1999	748.97
2000	754.21
2001	765.92
2002	772.57
2003	786.74
2004	802.31
2005	817.26
2006	829
2007	845.6
2008	846.97
2009	864.06
2010	862.94
2011	872.24
2012	881.56
2013	891.38
2014	894.14
2015	906.31
2016	921.98