Year	Number
1996	30.1507530212402
1998	30
2000	28.3582096099854
2002	33.3333320617676
2003	37.3134346008301
2004	32.211540222168
2005	29.6650714874268
2006	32.5358848571777
2007	33.0143547058105
2008	29.8076915740967
2009	38.3886260986328
2010	36.0189590454102
2011	42.7230033874512
2012	31.9248828887939
2013	31.9248828887939
2014	30.2884616851807
2015	31.9047622680664
2016	27.1428565979004
2017	26.1904754638672
2018	29.5238094329834
2019	30.9523811340332
2020	30.9523811340332
2021	36.6666679382324
2022	34.4339637756348