Year	Number
2004	0.7369264960289
2005	0.746284067630768
2006	0.703987658023834
2007	0.967931151390076
2008	0.984463036060333
2009	0.945724666118622
2010	0.919146716594696
2011	0.933990180492401
2012	0.952990829944611
2013	0.928985774517059
2014	1.08068346977234
2015	1.15167808532715
2016	1.15855598449707
2017	1.18432199954987
2018	1.16608023643494
2019	1.14571797847748
2020	1.09160161018372
2021	1.06857633590698
2022	1.12885904312134