Year	Number
1996	28.6432151794434
1998	32.5
2000	28.3582096099854
2002	32.8358192443848
2003	25.3731346130371
2004	28.8461532592773
2005	30.1435413360596
2006	29.6650714874268
2007	31.1004791259766
2008	34.6153831481934
2009	30.3317527770996
2010	28.9099521636963
2011	31.4553985595703
2012	33.3333320617676
2013	34.2723007202148
2014	35.0961532592773
2015	38.5714302062988
2016	34.761905670166
2017	38.5714302062988
2018	33.8095245361328
2019	30
2020	33.3333320617676
2021	34.2857131958008
2022	39.6226425170898