Year	Number
1996	12.5628137588501
1998	11.5
2000	11.4427862167358
2002	33.8308448791504
2003	33.3333320617676
2004	34.1346168518066
2005	27.2727279663086
2006	25.8373203277588
2007	23.9234447479248
2008	24.519229888916
2009	23.222749710083
2010	25.1184825897217
2011	23.474178314209
2012	24.8826293945313
2013	30.9859161376953
2014	22.5961532592773
2015	16.6666660308838
2016	18.0952377319336
2017	18.0952377319336
2018	21.9047622680664
2019	20.4761905670166
2020	22.380952835083
2021	22.380952835083
2022	22.6415100097656