Year	Number
1996	21.3114757537842
1998	27.8688526153564
2000	31.1475410461426
2002	45.9459457397461
2003	45.9459457397461
2004	28.3582096099854
2005	33.8235282897949
2006	16.0975608825684
2007	16.019416809082
2008	16.5048542022705
2009	13.3971290588379
2010	13.8755979537964
2011	11.3744077682495
2012	10.9004735946655
2013	9.95260620117188
2014	7.692307472229
2015	7.14285707473755
2016	6.66666650772095
2017	5.7142858505249
2018	7.14285707473755
2019	6.66666650772095
2020	9.0476188659668
2021	8.5714282989502
2022	8.96226406097412