Year	Number
1996	39.1304359436035
1998	40.7608680725098
2000	34.7826080322266
2002	46.4864883422852
2003	44.8648643493652
2004	44.7761192321777
2005	45.5882339477539
2006	48.529411315918
2007	42.2330093383789
2008	46.6019401550293
2009	47.8468894958496
2010	48.8038291931152
2011	44.0758285522461
2012	41.2322273254395
2013	41.7061614990234
2014	39.9038467407227
2015	40.476188659668
2016	40
2017	40.9523811340332
2018	42.3809509277344
2019	40
2020	32.8571434020996
2021	35.7142868041992
2022	39.1509437561035