Year	Number
1996	45.652172088623
1998	50
2000	49.4565200805664
2002	44.8648643493652
2003	41.6216201782227
2004	36.3184089660645
2005	42.1568641662598
2006	49.0196075439453
2007	49.5145645141602
2008	50.970874786377
2009	48.8038291931152
2010	50.7177047729492
2011	48.3412322998047
2012	51.1848335266113
2013	53.0805702209473
2014	53.3653831481934
2015	52.3809509277344
2016	52.8571434020996
2017	52.3809509277344
2018	51.9047622680664
2019	52.8571434020996
2020	54.2857131958008
2021	56.1904754638672
2022	54.2452812194824