Year	Number of
1990	952.07
1991	1011.16
1992	1074.22
1993	1140.49
1994	1212.26
1995	1291.81
1996	1369.21
1997	1453.59
1998	1544.08
1999	1638.68
2000	1745.29
2001	1846.7
2002	1954.25
2003	2067.94
2004	2190.25
2005	2325.45
2006	2448.47
2007	2581.14
2008	2725.89
2009	2881.71
2010	3048.84
2011	3181.7
2012	3325.84
2013	3478.95
2014	3632.43
2015	3794.76
2016	3965.93