Year	%
1995	51.25
1998	47.45
1999	25.46
2000	25.16
2001	20.24
2002	17.53
2003	17.26
2004	16.54
2005	14.37
2006	14.37
2007	14.11
2008	13.45
2009	13.91
2010	13.91
2011	13.91
2012	13.56
2013	13.55
2014	13.39
2015	12.38
2016	12.16
2018	12.18
2019	12.21
2020	11.44
2021	11.38