Year	Number
1996	21.1055278778076
1998	18.5
2000	18.4079608917236
2002	6.96517419815063
2003	6.96517419815063
2004	6.73076915740967
2005	8.13397121429443
2006	11.4832534790039
2007	12.9186601638794
2008	15.384614944458
2009	14.2180099487305
2010	11.3744077682495
2011	10.7981224060059
2012	12.2065725326538
2013	14.0845069885254
2014	17.3076915740967
2015	17.619047164917
2016	25.238094329834
2017	20.9523811340332
2018	21.9047622680664
2019	24.761905670166
2020	23.3333339691162
2021	16.6666660308838
2022	13.2075471878052