Year	Number
1996	7.5268816947937
1998	11.2299461364746
2000	10.1063833236694
2002	11.640212059021
2003	11.1111106872559
2004	7.38916254043579
2005	15.1219511032104
2006	16.5853652954102
2007	11.1650485992432
2008	10.6796112060547
2009	18.1818180084229
2010	17.1428565979004
2011	15.6398105621338
2012	13.2701425552368
2013	18.4834117889404
2014	22.5961532592773
2015	20.9523811340332
2016	12.8571424484253
2017	14.2857141494751
2018	16.6666660308838
2019	17.1428565979004
2020	21.9047622680664
2021	22.380952835083
2022	22.1698112487793