Year	Number of
1990	998.97
1991	1016.12
1992	1025.3
1993	1035.58
1994	1030.01
1995	1033.23
1996	1028.62
1997	1028.4
1998	1048.74
1999	1054.99
2000	1067.67
2001	1062.56
2002	1070.39
2003	1068.51
2004	1080.1
2005	1085.34
2006	1095.08
2007	1116.48
2008	1135.54
2009	1170.68
2010	1164.66
2011	1181.44
2012	1182.43
2013	1195.09
2014	1213.92
2015	1252.53
2016	1291.1