Year	%
1995	53.1
1998	35.05
1999	50.7
2000	50.72
2001	50.68
2002	18.55
2003	49.75
2004	41.61
2005	41.08
2006	41.15
2007	39.76
2008	39.67
2009	39.64
2010	39.75
2011	39.73
2012	39.71
2013	39.69
2014	36.4
2015	36.37
2016	36.62
2017	40
2018	39.95
2019	40.34