Year	Number
1996	16.6666660308838
1998	3.74331545829773
2000	0.531914889812469
2002	3.17460322380066
2003	11.1111106872559
2004	15.2709360122681
2005	23.4146347045898
2006	20.9756088256836
2007	19.4174766540527
2008	18.4466018676758
2009	20.0956935882568
2010	20.9523811340332
2011	21.3270149230957
2012	24.6445503234863
2013	26.0663509368896
2014	20.1923084259033
2015	19.0476188659668
2016	15.7142858505249
2017	20.4761905670166
2018	17.619047164917
2019	17.1428565979004
2020	18.0952377319336
2021	19.0476188659668
2022	19.8113212585449