Year	Number
1996	6.03015089035034
1998	7
2000	7.96019887924194
2002	5.97014904022217
2003	8.4577112197876
2004	3.36538457870483
2005	3.34928226470947
2006	1.91387557983398
2007	3.34928226470947
2008	4.32692289352417
2009	4.26540279388428
2010	4.26540279388428
2011	4.6948356628418
2012	5.63380289077759
2013	6.57277011871338
2014	6.25
2015	5.2380952835083
2016	6.1904764175415
2017	5.7142858505249
2018	6.1904764175415
2019	6.1904764175415
2020	6.1904764175415
2021	6.66666650772095
2022	6.13207530975342