Year	Number
1996	24.1935482025146
1998	27.2727279663086
2000	29.2553195953369
2002	30.1587295532227
2003	19.0476188659668
2004	19.2118225097656
2005	20
2006	15.6097564697266
2007	17.4757289886475
2008	17.4757289886475
2009	17.2248802185059
2010	17.1428565979004
2011	17.0616111755371
2012	16.1137447357178
2013	15.1658763885498
2014	18.269229888916
2015	25.7142848968506
2016	27.1428565979004
2017	25.7142848968506
2018	25.238094329834
2019	26.1904754638672
2020	26.6666660308838
2021	27.619047164917
2022	27.3584899902344