Year	Number
1996	63.5
1998	64.6766204833984
2000	65.1741256713867
2002	65.6716384887695
2003	67.164176940918
2004	66.3461532592773
2005	64.9038467407227
2006	70.6730804443359
2007	71.1538467407227
2008	71.6346130371094
2009	70.1421813964844
2010	69.6682434082031
2011	69.9530487060547
2012	69.9530487060547
2013	70.4225387573242
2014	70.9359588623047
2015	71.9211807250977
2016	72.9064025878906
2017	73.8916244506836
2018	69.4174728393555
2019	70.0483093261719
2020	68.5990371704102
2021	65.2173919677734
2022	65.7004852294922