Year	Number
1996	16.3043479919434
1998	10.8695650100708
2000	7.60869550704956
2002	11.8918914794922
2003	16.7567558288574
2004	12.4378108978271
2005	14.7058820724487
2006	10.7843141555786
2007	9.22330093383789
2008	8.73786449432373
2009	12.4401912689209
2010	11.4832534790039
2011	8.53080558776855
2012	11.3744077682495
2013	9.47867298126221
2014	10.0961542129517
2015	11.4285717010498
2016	10.9523811340332
2017	10.4761905670166
2018	13.3333330154419
2019	11.9047622680664
2020	14.7619047164917
2021	17.1428565979004
2022	20.2830181121826