Year	%
1991	13.84
1994	8.54
1995	8.07
1996	12.07
1997	11.8
1998	11.92
1999	9.63
2000	13.62
2001	12.84
2002	12.42
2003	12.31
2004	6.95
2005	6.45
2006	5.45
2007	5.77
2008	6.44
2009	5.81
2010	6.6
2011	6.68
2012	6.38
2013	6.8
2014	6.57
2015	6.44
2016	5.88
2017	5.65
2018	5.73
2019	5.73
2020	5.67
2021	6.21