Year	Number
1996	18.0851058959961
1998	14.8936166763306
2000	23.280424118042
2002	24.8677253723145
2003	24.1206035614014
2004	26.2135925292969
2005	27.1844654083252
2006	33.3333320617676
2007	38.164249420166
2008	31.25
2009	27.014217376709
2010	30.8056869506836
2011	34.5971565246582
2012	35.5450248718262
2013	32.7014236450195
2014	29.0476188659668
2015	26.1904754638672
2016	27.619047164917
2017	24.761905670166
2018	25.4716987609863
2019	22.6415100097656
2020	23.5849056243896
2021	12.2641506195068
2022	12.7358493804932