Year	Number
1996	11.702127456665
1998	13.8297872543335
2000	15.3439149856567
2002	4.7619047164917
2003	8.04020118713379
2004	8.73786449432373
2005	9.70873832702637
2006	5.31400966644287
2007	5.79710149765015
2008	6.25
2009	4.7393364906311
2010	3.79146909713745
2011	5.21327018737793
2012	5.21327018737793
2013	3.3175356388092
2014	0.476190477609634
2015	6.66666650772095
2016	7.14285707473755
2017	5.2380952835083
2018	3.77358484268188
2019	4.24528312683105
2020	2.8301887512207
2021	4.24528312683105
2022	4.24528312683105