Year	Number
1996	68.5
1998	72.1393051147461
2000	71.6417922973633
2002	58.2089538574219
2003	63.1840782165527
2004	59.1346168518066
2005	58.6538467407227
2006	65.3846130371094
2007	65.3846130371094
2008	63.461540222168
2009	64.9289093017578
2010	63.9810409545898
2011	58.6854476928711
2012	57.7464790344238
2013	58.6854476928711
2014	63.0541877746582
2015	64.0394058227539
2016	67.4876861572266
2017	66.5024642944336
2018	62.1359214782715
2019	56.038646697998
2020	52.6570053100586
2021	45.4106292724609
2022	41.062801361084