Year	Number
1996	47.7386932373047
1998	45
2000	46.2686576843262
2002	52.2388076782227
2003	51.243782043457
2004	42.788459777832
2005	42.5837326049805
2006	51.1961708068848
2007	51.6746406555176
2008	58.1730766296387
2009	54.502368927002
2010	53.0805702209473
2011	52.582160949707
2012	56.3380279541016
2013	55.3990592956543
2014	55.288459777832
2015	56.1904754638672
2016	58.0952377319336
2017	52.8571434020996
2018	55.7142868041992
2019	56.1904754638672
2020	54.2857131958008
2021	54.761905670166
2022	55.6603775024414