Year	Number
1996	19.0954780578613
1998	22.5
2000	17.412935256958
2002	14.9253730773926
2003	8.4577112197876
2004	15.865385055542
2005	8.13397121429443
2006	11.4832534790039
2007	11.0047845840454
2008	9.61538505554199
2009	10.9004735946655
2010	10.4265403747559
2011	14.0845069885254
2012	12.6760559082031
2013	10.3286380767822
2014	11.5384616851807
2015	10.4761905670166
2016	11.9047622680664
2017	11.4285717010498
2018	15.2380952835083
2019	12.8571424484253
2020	16.6666660308838
2021	15.7142858505249
2022	19.8113212585449