Year	Number
1996	26.6331653594971
1998	27
2000	32.3383102416992
2002	24.8756217956543
2003	18.4079608917236
2004	15.865385055542
2005	15.3110046386719
2006	19.6172256469727
2007	19.6172256469727
2008	22.5961532592773
2009	19.4312801361084
2010	19.4312801361084
2011	21.1267604827881
2012	17.3708915710449
2013	16.9014091491699
2014	20.1923084259033
2015	21.9047622680664
2016	29.0476188659668
2017	24.2857151031494
2018	29.0476188659668
2019	29.0476188659668
2020	27.1428565979004
2021	30.4761905670166
2022	30.6603775024414