Year	Number
1996	28.2608699798584
1998	36.4130439758301
2000	47.8260879516602
2002	39.4594612121582
2003	28.1081085205078
2004	33.8308448791504
2005	24.5098037719727
2006	26.9607849121094
2007	25.7281551361084
2008	34.4660186767578
2009	35.4067001342773
2010	35.8851661682129
2011	33.6492881774902
2012	34.5971565246582
2013	36.9668235778809
2014	36.0576934814453
2015	31.9047622680664
2016	24.761905670166
2017	23.8095245361328
2018	21.9047622680664
2019	20.9523811340332
2020	23.3333339691162
2021	22.8571434020996
2022	22.6415100097656