Year	%
1995	50.26
1998	45.83
1999	24.54
2000	24.05
2001	20.34
2002	17.37
2003	16.98
2004	16.17
2005	14.72
2006	14.86
2007	14.97
2008	14.06
2009	14.72
2010	14.79
2011	14.39
2012	14.14
2013	14.65
2014	13.63
2015	12.73
2016	12.55
2018	12.58
2019	12.55
2020	11.7
2021	11.65