Year	Number
1996	9.8360652923584
1998	10.9289617538452
2000	10.382513999939
2002	23.2432441711426
2003	31.8918914794922
2004	25.8706474304199
2005	25
2006	23.9024391174316
2007	22.8155345916748
2008	27.1844654083252
2009	28.2296657562256
2010	28.7081336975098
2011	29.3838863372803
2012	27.962085723877
2013	26.5402851104736
2014	24.519229888916
2015	25.7142848968506
2016	27.1428565979004
2017	21.9047622680664
2018	18.5714282989502
2019	19.0476188659668
2020	28.0952377319336
2021	30.4761905670166
2022	28.7735843658447