Year	Number of
1990	670
1991	686.31
1992	709.89
1993	725.61
1994	745.88
1995	768.76
1996	811.74
1997	845.06
1998	875.47
1999	909.55
2000	942.59
2001	942.05
2002	968.12
2003	995.05
2004	1025.99
2005	1063.23
2006	1085.18
2007	1097.48
2008	1127.87
2009	1143.54
2010	1168.05
2011	1185.44
2012	1190.67
2013	1195.96
2014	1202.23
2015	1197.78
2016	1212.73