Year	Number
1996	66.129035949707
1998	63.6363639831543
2000	62.2340431213379
2002	58.201057434082
2003	58.7301597595215
2004	58.6206893920898
2005	60.9756088256836
2006	59.0243911743164
2007	55.3398056030273
2008	54.3689308166504
2009	54.5454559326172
2010	52.8571434020996
2011	52.1327018737793
2012	43.1279602050781
2013	44.5497627258301
2014	45.6730766296387
2015	47.6190490722656
2016	49.523811340332
2017	43.3333320617676
2018	42.8571434020996
2019	47.1428565979004
2020	45.238094329834
2021	46.1904754638672
2022	31.6037731170654