Year	Number
1996	38.1909561157227
1998	38
2000	37.3134346008301
2002	38.3084564208984
2003	39.8009948730469
2004	42.3076934814453
2005	33.0143547058105
2006	35.4067001342773
2007	41.1483268737793
2008	44.230770111084
2009	41.2322273254395
2010	36.0189590454102
2011	32.8638496398926
2012	35.2112693786621
2013	37.5586853027344
2014	32.6923065185547
2015	29.0476188659668
2016	25.238094329834
2017	29.0476188659668
2018	26.6666660308838
2019	25.7142848968506
2020	22.380952835083
2021	23.3333339691162
2022	22.1698112487793