Year	Number
1996	76.8844223022461
1998	80
2000	79.6019897460938
2002	77.6119384765625
2003	78.6069641113281
2004	76.4423065185547
2005	78.9473648071289
2006	78.4689025878906
2007	79.9043045043945
2008	81.7307662963867
2009	81.5165863037109
2010	80.568717956543
2011	79.3427200317383
2012	79.3427200317383
2013	80.7511749267578
2014	29.3269233703613
2015	68.5714263916016
2016	68.0952377319336
2017	68.0952377319336
2018	69.0476226806641
2019	65.2380981445313
2020	65.7142868041992
2021	66.6666641235352
2022	66.9811325073242