Year	Number
1996	63.440860748291
1998	67.914436340332
2000	60.638298034668
2002	58.201057434082
2003	58.7301597595215
2004	56.1576347351074
2005	52.1951217651367
2006	48.7804870605469
2007	53.8834953308105
2008	52.9126205444336
2009	55.5023918151855
2010	60
2011	52.6066360473633
2012	48.8151664733887
2013	52.6066360473633
2014	54.3269233703613
2015	55.238094329834
2016	57.6190490722656
2017	56.1904754638672
2018	54.2857131958008
2019	52.8571434020996
2020	47.1428565979004
2021	49.523811340332
2022	51.4150924682617