Year	%
1993	8.7
1995	12.19
1996	26.02
1997	23.77
1998	25.97
1999	27.86
2000	29.08
2001	28.81
2002	29.14
2003	28.54
2004	28.09
2005	27.71
2006	27.8
2007	29.66
2008	27.72
2009	28.58
2010	28.45
2011	27.42
2013	29.37
2015	31.92
2016	29.54
2017	29.64
2018	28.76
2019	31.1
2020	28.79
2021	29.18