Year	Number
1999	11.01464
2000	10.00528
2001	10.12187
2002	9.90552
2003	9.98708
2004	9.67055
2005	9.75965
2006	10.93305
2007	10.82505
2008	10.9359
2009	11.03543
2010	11.23197
2011	11.18343
2012	10.99938
2013	11.22372