Year	Number
1996	17.2043018341064
1998	16.0427799224854
2000	15.957447052002
2002	10.0529098510742
2003	11.1111106872559
2004	12.8078813552856
2005	8.78048801422119
2006	6.82926845550537
2007	4.85436916351318
2008	5.82524251937866
2009	4.30622005462646
2010	10.4761905670166
2011	6.63507127761841
2012	11.3744077682495
2013	11.3744077682495
2014	12.5
2015	10.9523811340332
2016	12.380952835083
2017	12.8571424484253
2018	16.1904754638672
2019	17.1428565979004
2020	13.3333330154419
2021	12.8571424484253
2022	10.3773584365845