Year	Number
1996	75.4098358154297
1998	72.1311492919922
2000	69.3989105224609
2002	66.4864883422852
2003	67.5675659179688
2004	67.164176940918
2005	66.1764678955078
2006	64.3902435302734
2007	66.019416809082
2008	67.4757308959961
2009	68.8995208740234
2010	70.8134002685547
2011	70.1421813964844
2012	70.6161117553711
2013	70.6161117553711
2014	74.5192337036133
2015	74.2857131958008
2016	72.3809509277344
2017	71.9047622680664
2018	71.9047622680664
2019	70.476188659668
2020	64.2857131958008
2021	61.4285697937012
2022	61.7924537658691