Year	Number
1996	4.89130449295044
1998	11.4130430221558
2000	15.2173910140991
2002	12.972972869873
2003	18.9189186096191
2004	20.8955230712891
2005	20.5882358551025
2006	37.2549018859863
2007	52.4271850585938
2008	57.7669906616211
2009	58.8516731262207
2010	62.2009582519531
2011	63.0331764221191
2012	64.4549789428711
2013	66.3507080078125
2014	66.3461532592773
2015	66.1904754638672
2016	68.5714263916016
2017	71.9047622680664
2018	74.2857131958008
2019	73.8095245361328
2020	72.3809509277344
2021	71.9047622680664
2022	72.1698150634766