Year	Number
1996	6.01092910766602
1998	5.46448087692261
2000	4.37158489227295
2002	5.94594573974609
2003	5.40540552139282
2004	5.97014904022217
2005	14.2156858444214
2006	18.0487804412842
2007	13.1067962646484
2008	12.1359224319458
2009	14.8325357437134
2010	10.5263156890869
2011	12.3222751617432
2012	11.8483409881592
2013	23.6966819763184
2014	25
2015	30.9523811340332
2016	33.8095245361328
2017	32.8571434020996
2018	33.3333320617676
2019	34.761905670166
2020	30
2021	42.8571434020996
2022	32.0754699707031