Year	Number
1996	42.7135696411133
1998	42.5
2000	31.8407955169678
2002	32.3383102416992
2003	23.3830852508545
2004	19.230770111084
2005	33.4928245544434
2006	30.6220092773438
2007	27.2727279663086
2008	24.0384616851807
2009	23.222749710083
2010	26.0663509368896
2011	28.1690139770508
2012	26.7605628967285
2013	30.046947479248
2014	31.25
2015	29.0476188659668
2016	25.238094329834
2017	22.8571434020996
2018	21.4285717010498
2019	21.9047622680664
2020	19.0476188659668
2021	18.5714282989502
2022	23.5849056243896