Year	Number
1996	72.5
1998	67.6616897583008
2000	67.164176940918
2002	63.1840782165527
2003	62.1890563964844
2004	64.9038467407227
2005	64.9038467407227
2006	69.2307662963867
2007	67.788459777832
2008	68.2692337036133
2009	66.3507080078125
2010	65.4028472900391
2011	64.7887344360352
2012	65.7276992797852
2013	65.7276992797852
2014	70.9359588623047
2015	71.9211807250977
2016	71.4285736083984
2017	71.4285736083984
2018	70.3883514404297
2019	70.0483093261719
2020	71.0144958496094
2021	70.5314025878906
2022	70.5314025878906