Year	Number
1996	10.0502510070801
1998	9
2000	8.95522403717041
2002	10.945273399353
2003	10.4477615356445
2004	11.5384616851807
2005	10.5263156890869
2006	13.3971290588379
2007	16.7464122772217
2008	21.634614944458
2009	17.5355453491211
2010	15.6398105621338
2011	15.962441444397
2012	15.023473739624
2013	11.7370891571045
2014	7.21153831481934
2015	6.1904764175415
2016	7.61904764175415
2017	8.09523773193359
2018	6.66666650772095
2019	8.09523773193359
2020	11.9047622680664
2021	10.9523811340332
2022	7.07547187805176