Year	Number
1996	62.5
1998	62.6865653991699
2000	57.2139320373535
2002	52.2388076782227
2003	50.7462692260742
2004	45.1923065185547
2005	49.038459777832
2006	54.3269233703613
2007	56.25
2008	55.769229888916
2009	55.4502372741699
2010	55.4502372741699
2011	54.9295768737793
2012	55.3990592956543
2013	56.3380279541016
2014	56.6502456665039
2015	56.6502456665039
2016	58.1280784606934
2017	57.6354675292969
2018	56.7961158752441
2019	56.5217399597168
2020	55.5555572509766
2021	55.5555572509766
2022	55.0724639892578