Year	Number
1996	37.5
1998	44.0217399597168
2000	56.5217399597168
2002	57.2972984313965
2003	55.6756744384766
2004	52.7363166809082
2005	52.9411773681641
2006	54.4117660522461
2007	51.9417457580566
2008	51.4563102722168
2009	44.0191383361816
2010	39.7129173278809
2011	41.7061614990234
2012	42.1800956726074
2013	37.4407577514648
2014	36.0576934814453
2015	32.8571434020996
2016	34.2857131958008
2017	33.3333320617676
2018	32.8571434020996
2019	32.8571434020996
2020	32.3809509277344
2021	32.3809509277344
2022	32.0754699707031