Year	Number
2004	0.410197407007217
2005	0.265190988779068
2006	0.31173050403595
2007	0.316639214754105
2008	0.305909484624863
2009	0.300981521606445
2010	0.288806110620499
2011	0.299673110246658
2012	0.299872100353241
2013	0.293751776218414
2014	0.306705415248871
2015	0.338430404663086
2016	0.335610568523407
2017	0.392347872257233
2018	0.385205060243607
2019	0.391434550285339
2020	0.427005618810654
2021	0.402841687202454
2022	0.379767835140228