Year	Number
1996	17.4863395690918
1998	18.5792350769043
2000	24.0437164306641
2002	21.6216220855713
2003	23.7837829589844
2004	28.3582096099854
2005	34.3137245178223
2006	25.3658542633057
2007	23.7864074707031
2008	35.4368934631348
2009	33.0143547058105
2010	33.9712905883789
2011	34.5971565246582
2012	31.2796211242676
2013	29.3838863372803
2014	28.365385055542
2015	27.619047164917
2016	29.5238094329834
2017	29.0476188659668
2018	29.5238094329834
2019	22.380952835083
2020	26.1904754638672
2021	23.3333339691162
2022	21.2264156341553