Year	Number of
1990	482.07
1991	518.83
1992	567.76
1993	629.91
1994	697.72
1995	757.82
1996	796.68
1997	825.74
1998	849.86
1999	881.15
2000	919.4
2001	964.69
2002	1005.06
2003	1047.53
2004	1089.81
2005	1127.15
2006	1156.51
2007	1176.87
2008	1197.21
2009	1211.37
2010	1230.79
2011	1251.74
2012	1278.86
2013	1313.36
2014	1353.63
2015	1395.71
2016	1445.71