Year	Number
1996	22.8260860443115
1998	12.5
2000	15.2173910140991
2002	20
2003	20.5405406951904
2004	11.9402980804443
2005	13.235294342041
2006	17.6470584869385
2007	13.1067962646484
2008	9.70873832702637
2009	10.0478467941284
2010	12.4401912689209
2011	11.8483409881592
2012	9.95260620117188
2013	9.00473976135254
2014	9.61538505554199
2015	9.0476188659668
2016	9.0476188659668
2017	10
2018	9.0476188659668
2019	9.0476188659668
2020	9.5238094329834
2021	8.5714282989502
2022	8.01886749267578