Year	Number
1996	83.606559753418
1998	81.420768737793
2000	77.5956268310547
2002	80
2003	75.6756744384766
2004	71.1442794799805
2005	75
2006	82.4390258789063
2007	77.1844635009766
2008	79.1262130737305
2009	81.8181838989258
2010	77.9904327392578
2011	80.568717956543
2012	79.1469192504883
2013	76.7772521972656
2014	73.5576934814453
2015	68.5714263916016
2016	71.9047622680664
2017	64.2857131958008
2018	47.1428565979004
2019	57.6190490722656
2020	50.476188659668
2021	51.4285697937012
2022	49.0566024780273