Year	Number of
1990	956.7
1991	990.46
1992	1025
1993	1065.59
1994	1108.05
1995	1153.51
1996	1207.63
1997	1263.08
1998	1331.13
1999	1400.24
2000	1471.2
2001	1539.61
2002	1609.15
2003	1684.25
2004	1759.63
2005	1836.1
2006	1916.05
2007	1994.55
2008	2077.11
2009	2160.3
2010	2245.76
2011	2342.84
2012	2442.67
2013	2545.02
2014	2651.92
2015	2764.78
2016	2897.25