Year	Number
1996	74.1935501098633
1998	75.4010696411133
2000	75.5319137573242
2002	73.0158767700195
2003	74.0740737915039
2004	73.8916244506836
2005	72.1951217651367
2006	73.1707305908203
2007	73.3009719848633
2008	69.9029159545898
2009	69.3779907226563
2010	65.7142868041992
2011	67.7725143432617
2012	65.4028472900391
2013	64.9289093017578
2014	61.0576934814453
2015	60
2016	58.5714302062988
2017	57.6190490722656
2018	58.0952377319336
2019	57.6190490722656
2020	58.0952377319336
2021	55.238094329834
2022	51.4150924682617