Year	%
1995	43.2
2000	41.1
2003	40
2004	40.8
2005	41.7
2006	42
2007	41.1
2008	40.9
2009	40.9
2010	41
2011	41
2012	42.1
2013	42.2
2014	41.8
2015	41.8
2016	41.3
2017	41.1
2018	40.1
2019	40.1
2020	40.5
2021	40.1