Year	Number
1995	12.59179
1998	11.72919
1999	12.00848
2000	11.90317
2001	11.90457
2002	12.1802
2003	11.37577
2004	10.68581
2005	10.47201
2014	10.34535
2015	10.19915
2016	9.99291
2017	10.1088
2018	9.56937