Year	Number
1996	51.2562828063965
1998	52
2000	52.7363166809082
2002	42.7860679626465
2003	48.2587051391602
2004	44.711540222168
2005	49.2822952270508
2006	51.6746406555176
2007	50.7177047729492
2008	50.480770111084
2009	47.8672981262207
2010	46.9194297790527
2011	46.478874206543
2012	46.478874206543
2013	46.0093879699707
2014	43.269229888916
2015	43.8095245361328
2016	40.9523811340332
2017	43.8095245361328
2018	44.2857131958008
2019	42.8571434020996
2020	42.8571434020996
2021	40
2022	47.6415100097656