Year	Number
1996	80.4020080566406
1998	69
2000	70.6467666625977
2002	70.6467666625977
2003	68.1592025756836
2004	67.788459777832
2005	65.5502395629883
2006	68.4210510253906
2007	66.5071792602539
2008	68.2692337036133
2009	66.3507080078125
2010	67.7725143432617
2011	71.8309860229492
2012	69.4835662841797
2013	70.8920211791992
2014	76.9230804443359
2015	77.6190490722656
2016	74.7619018554688
2017	75.2380981445313
2018	73.3333358764648
2019	75.7142868041992
2020	74.2857131958008
2021	70.9523773193359
2022	70.7547149658203