Year	Number
1996	38.1909561157227
1998	39.5
2000	28.8557205200195
2002	20.8955230712891
2003	23.3830852508545
2004	32.211540222168
2005	33.4928245544434
2006	25.8373203277588
2007	25.8373203277588
2008	30.769229888916
2009	30.8056869506836
2010	33.6492881774902
2011	34.2723007202148
2012	38.0281677246094
2013	33.8028182983398
2014	36.538459777832
2015	30.9523811340332
2016	24.2857151031494
2017	27.619047164917
2018	27.1428565979004
2019	25.238094329834
2020	23.8095245361328
2021	30
2022	32.0754699707031