Year	Number
1996	23.9361705780029
1998	24.4680843353271
2000	35.4497337341309
2002	31.7460308074951
2003	36.1809043884277
2004	32.0388336181641
2005	40.7766990661621
2006	40.0966186523438
2007	29.9516906738281
2008	29.8076915740967
2009	24.1706161499023
2010	26.5402851104736
2011	28.4360198974609
2012	20.3791465759277
2013	19.4312801361084
2014	20.4761905670166
2015	10
2016	7.14285707473755
2017	8.5714282989502
2018	14.1509437561035
2019	13.6792449951172
2020	19.8113212585449
2021	18.8679237365723
2022	22.1698112487793