Year	Number
1996	53.5
1998	51.243782043457
2000	53.7313423156738
2002	56.7164192199707
2003	57.2139320373535
2004	58.1730766296387
2005	59.6153831481934
2006	57.6923065185547
2007	60.0961532592773
2008	58.1730766296387
2009	57.8199043273926
2010	56.8720397949219
2011	55.8685455322266
2012	56.3380279541016
2013	55.3990592956543
2014	53.2019691467285
2015	54.1871910095215
2016	53.694580078125
2017	54.1871910095215
2018	52.4271850585938
2019	52.6570053100586
2020	51.6908226013184
2021	51.6908226013184
2022	51.6908226013184