Year	%
1993	58.49
1997	30.9
2000	43.71
2001	40.75
2002	40.28
2003	39.36
2005	34.81
2006	33.67
2007	32.61
2008	32.49
2009	28.44
2010	27.43
2011	26.32
2012	25.93
2014	18.31
2015	18.87
2016	18.87
2017	18.95
2019	18.93
2020	18.93
2021	20.21