Year	%
1991	13.15
1992	15.09
1996	7.18
1999	17.85
2001	6.56
2002	4.92
2003	5.46
2004	6.23
2005	8.3
2006	12.49
2007	10.65
2008	14.29
2010	8.61
2011	8.62
2012	9.06
2013	9.03
2021	8.87