Year	Number of
1990	703.54
1991	753.57
1992	805.39
1993	850.59
1994	902.97
1995	968.65
1996	1031.93
1997	1131.47
1998	1246.53
1999	1242.8
2000	1278.79
2001	1300.72
2002	1318.72
2003	1341.19
2004	1381.26
2005	1417.69
2006	1453.72
2007	1506.49
2008	1556.73
2009	1603.59
2010	1667.64
2011	1738.1
2012	1809.2
2013	1872.68
2014	1954.75
2015	2051.21
2016	2131.56