Year	Number
1996	30.4347820281982
1998	39.6739120483398
2000	29.8913040161133
2002	41.6216201782227
2003	44.3243255615234
2004	50.2487564086914
2005	53.4313735961914
2006	55.3921585083008
2007	57.7669906616211
2008	59.7087364196777
2009	62.2009582519531
2010	63.6363639831543
2011	63.9810409545898
2012	60.1895751953125
2013	62.5592422485352
2014	63.461540222168
2015	62.3809509277344
2016	63.8095245361328
2017	59.0476188659668
2018	58.0952377319336
2019	60.476188659668
2020	52.3809509277344
2021	50.9523811340332
2022	52.8301887512207