Year	Number
1996	64.5
1998	58.2089538574219
2000	58.7064666748047
2002	55.7213935852051
2003	54.2288551330566
2004	57.6923065185547
2005	59.6153831481934
2006	60.0961532592773
2007	59.1346168518066
2008	59.6153831481934
2009	58.2938385009766
2010	57.8199043273926
2011	57.7464790344238
2012	60.0938949584961
2013	59.6244125366211
2014	66.0098495483398
2015	67.4876861572266
2016	66.9950714111328
2017	65.5172424316406
2018	62.1359214782715
2019	63.7681159973145
2020	63.7681159973145
2021	63.2850227355957
2022	63.2850227355957