Year	%
1995	50.37
1998	44.38
1999	26.41
2000	26.06
2001	22.45
2002	19.01
2003	18.56
2004	15.9
2005	14.66
2006	14.63
2007	13.4
2008	12.19
2009	12.12
2010	13.01
2011	13.1
2012	13.34
2013	12.62
2014	12.75
2015	13.08
2016	13.4
2018	13.49
2019	12.74
2020	12.2
2021	12.81