Year	Number
1996	50.2512550354004
1998	48
2000	45.7711448669434
2002	44.2786064147949
2003	45.7711448669434
2004	47.1153831481934
2005	46.8899536132813
2006	50.7177047729492
2007	52.1531105041504
2008	53.8461532592773
2009	56.8720397949219
2010	58.2938385009766
2011	57.7464790344238
2012	57.7464790344238
2013	58.6854476928711
2014	64.9038467407227
2015	61.4285697937012
2016	67.1428604125977
2017	67.1428604125977
2018	63.3333320617676
2019	63.8095245361328
2020	62.8571434020996
2021	62.3809509277344
2022	62.2641525268555