Year	Number of
1990	961.32
1991	993.52
1992	1025.75
1993	1059
1994	1093.6
1995	1130.92
1996	1165.8
1997	1202.89
1998	1242.03
1999	1283
2000	1326.36
2001	1365.1
2002	1405.68
2003	1447.87
2004	1491.05
2005	1536.29
2006	1591.3
2007	1648.71
2008	1711.2
2009	1779.05
2010	1854.08
2011	1937.95
2012	2029.5
2013	2125.94
2014	2231.55
2015	2347.12
2016	2472.9