Year	Number of
1990	79.65
1991	85.18
1992	91.45
1993	98.64
1994	106.95
1995	116.72
1996	126.88
1997	138.8
1998	152.71
1999	168.47
2000	186.26
2001	199.97
2002	214.18
2003	229.25
2004	245.64
2005	263.8
2006	278.43
2007	294.27
2008	311.25
2009	329.05
2010	347.53
2011	358.1
2012	368.94
2013	380.18
2014	391.93
2015	404.21
2016	416.22