Year	Number
1995	15.04647
1996	14.57471
2002	8.94335
2003	8.69365
2004	8.82359
2005	9.38638
2006	9.18959
2007	9.29593
2008	11.40172
2009	10.78836
2010	11.04787
2011	11.34874
2012	11.58455
2013	11.48407
2014	11.48738
2015	11.69287
2016	11.34203
2017	11.2862