Year	Number
1996	29.8913040161133
1998	38.5869560241699
2000	31.5217399597168
2002	23.2432441711426
2003	26.4864864349365
2004	26.8656711578369
2005	24.0196075439453
2006	26.470588684082
2007	30.0970878601074
2008	34.9514579772949
2009	32.5358848571777
2010	33.0143547058105
2011	34.1232223510742
2012	35.5450248718262
2013	34.1232223510742
2014	32.211540222168
2015	34.761905670166
2016	30.9523811340332
2017	32.3809509277344
2018	32.8571434020996
2019	29.0476188659668
2020	26.6666660308838
2021	32.3809509277344
2022	32.0754699707031