Year	Number of
1990	798.28
1991	833.82
1992	865.29
1993	876.2
1994	917.71
1995	967.82
1996	1026.87
1997	1020.76
1998	1051.71
1999	1066
2000	1084.96
2001	1112.97
2002	1110.09
2003	1177.83
2004	1169.76
2005	1181.38
2006	1205.03
2007	1235.71
2008	1302.59
2009	1342.06
2010	1376.99
2011	1417.1
2012	1454.95
2013	1469.61
2014	1496.62
2015	1527.31
2016	1560.7