Year	Number of
1990	915.66
1991	950.8
1992	988.51
1993	1024.63
1994	1027.89
1995	1049.3
1996	1083.52
1997	1114.04
1998	1155.58
1999	1170.17
2000	1211.78
2001	1234.43
2002	1282.32
2003	1312.38
2004	1342.72
2005	1370.1
2006	1415.5
2007	1462.68
2008	1490.32
2009	1554.79
2010	1606.19
2011	1661.07
2012	1717.8
2013	1793.31
2014	1863.89
2015	1949.65
2016	2043.18