Year	Number
1996	50.5376358032227
1998	49.7326202392578
2000	54.2553176879883
2002	57.6719589233398
2003	59.2592582702637
2004	58.6206893920898
2005	58.0487823486328
2006	58.5365867614746
2007	56.3106803894043
2008	56.7961158752441
2009	55.9808616638184
2010	52.8571434020996
2011	55.4502372741699
2012	52.1327018737793
2013	52.1327018737793
2014	52.4038467407227
2015	52.3809509277344
2016	52.8571434020996
2017	47.1428565979004
2018	52.3809509277344
2019	52.8571434020996
2020	54.761905670166
2021	50
2022	51.4150924682617