Year	%
1993	54.72
1997	24.77
2000	37.46
2001	35.2
2002	34.71
2003	33.74
2005	23.18
2006	21.72
2007	19.71
2008	20.49
2009	17.98
2010	25.56
2011	23.91
2012	12.69
2014	9.3
2015	9.14
2016	8.86
2017	8.84
2019	7.69
2020	7.7
2021	7.75