Year	Number
1996	75.5
1998	74.1293563842773
2000	73.6318435668945
2002	73.1343307495117
2003	74.1293563842773
2004	77.8846130371094
2005	74.5192337036133
2006	74.5192337036133
2007	74.038459777832
2008	72.5961532592773
2009	74.407585144043
2010	75.3554534912109
2011	74.6478881835938
2012	75.1173706054688
2013	75.5868530273438
2014	76.3546829223633
2015	77.3399047851563
2016	78.3251266479492
2017	78.3251266479492
2018	77.1844635009766
2019	80.1932373046875
2020	80.6763305664063
2021	80.6763305664063
2022	81.159423828125