Year	Number
1996	25.2688179016113
1998	30.4812831878662
2000	39.8936157226563
2002	34.3915328979492
2003	39.1534385681152
2004	20.6896553039551
2005	22.9268283843994
2006	34.634147644043
2007	34.4660186767578
2008	32.0388336181641
2009	21.5311012268066
2010	20.9523811340332
2011	21.3270149230957
2012	21.3270149230957
2013	26.0663509368896
2014	30.769229888916
2015	31.4285717010498
2016	30
2017	31.9047622680664
2018	31.9047622680664
2019	28.5714282989502
2020	28.5714282989502
2021	32.3809509277344
2022	33.0188674926758