Year	Number
1996	76.5
1998	82.0895538330078
2000	78.6069641113281
2002	78.6069641113281
2003	86.5671615600586
2004	87.0192337036133
2005	83.6538467407227
2006	77.8846130371094
2007	78.8461532592773
2008	73.5576934814453
2009	73.9336471557617
2010	74.407585144043
2011	72.7699508666992
2012	69.4835662841797
2013	68.0751190185547
2014	68.4729080200195
2015	70.4433517456055
2016	70.4433517456055
2017	69.4581298828125
2018	71.8446578979492
2019	72.4637680053711
2020	78.260871887207
2021	77.7777786254883
2022	76.8115921020508