Year	Number of
1990	1059.41
1991	1127.16
1992	1201.65
1993	1279.14
1994	1364.13
1995	1458.94
1996	1595.45
1997	1747.56
1998	1915.8
1999	2102.63
2000	2312.31
2001	2488.74
2002	2680.33
2003	2893.29
2004	3129.94
2005	3396.88
2006	3631.13
2007	3886.86
2008	4196.97
2009	4528.51
2010	4883.04
2011	5100.37
2012	5327.86
2013	5559.87
2014	5805.93
2015	6069.75
2016	6397.07