Year	Number of
1990	536.63
1991	568.76
1992	604.51
1993	642.72
1994	685
1995	730.83
1996	784.97
1997	842.68
1998	905.89
1999	974.68
2000	1047.39
2001	1104.13
2002	1164.93
2003	1229.18
2004	1301.04
2005	1367.06
2006	1439.95
2007	1479.39
2008	1553.3
2009	1638.28
2010	1718.26
2011	1782.86
2012	1820.88
2013	1860.52
2014	1902.1
2015	1945.78
2016	1992.39