Year	Number
1996	57.5
1998	59.7014923095703
2000	58.7064666748047
2002	57.7114410400391
2003	56.2189064025879
2004	55.288459777832
2005	55.769229888916
2006	57.6923065185547
2007	58.1730766296387
2008	57.6923065185547
2009	57.8199043273926
2010	55.4502372741699
2011	55.8685455322266
2012	56.8075103759766
2013	58.6854476928711
2014	59.1133003234863
2015	58.6206893920898
2016	62.5615768432617
2017	61.5763549804688
2018	59.2233009338379
2019	59.9033813476563
2020	58.937198638916
2021	58.937198638916
2022	58.937198638916