Year	Number
1993	11.04785
1994	10.17146
1995	10.08986
1998	9.50255
2008	6.86432
2009	7.31984
2010	6.90694
2011	7.71861
2012	7.75472
2013	7.95076
2014	7.97452
2015	7.63863
2016	9.17398