Year	Number
1996	21.1956520080566
1998	18.4782600402832
2000	15.2173910140991
2002	14.5945949554443
2003	24.3243236541748
2004	20.8955230712891
2005	30.8823528289795
2006	26.470588684082
2007	25.2427177429199
2008	29.6116504669189
2009	31.1004791259766
2010	31.1004791259766
2011	33.1753540039063
2012	27.488151550293
2013	27.014217376709
2014	31.730770111084
2015	39.0476188659668
2016	34.2857131958008
2017	45.7142868041992
2018	43.8095245361328
2019	44.761905670166
2020	42.8571434020996
2021	43.3333320617676
2022	39.1509437561035