Year	Number
1996	29.6482410430908
1998	32.5
2000	27.8606967926025
2002	29.8507461547852
2003	25.3731346130371
2004	18.269229888916
2005	18.1818180084229
2006	11.0047845840454
2007	8.61244010925293
2008	7.692307472229
2009	7.5829381942749
2010	6.16113758087158
2011	6.1032862663269
2012	4.22535228729248
2013	4.22535228729248
2014	2.4038462638855
2015	3.33333325386047
2016	4.2857141494751
2017	4.7619047164917
2018	5.2380952835083
2019	5.2380952835083
2020	5.2380952835083
2021	5.2380952835083
2022	2.8301887512207