Year	Number
1996	20.7650279998779
1998	18.032787322998
2000	12.021858215332
2002	14.5945949554443
2003	19.4594593048096
2004	20.8955230712891
2005	14.2156858444214
2006	13.1707315444946
2007	9.22330093383789
2008	12.62135887146
2009	12.9186601638794
2010	13.3971290588379
2011	15.1658763885498
2012	8.53080558776855
2013	8.05687236785889
2014	5.28846168518066
2015	5.7142858505249
2016	3.33333325386047
2017	5.2380952835083
2018	3.80952382087708
2019	2.85714292526245
2020	2.38095235824585
2021	3.80952382087708
2022	2.35849046707153