Year	%
1993	13.02
1996	10.5
1997	10.44
1998	10.5
1999	10.32
2000	10.63
2001	11.14
2002	10.9
2003	11.15
2004	10.13
2005	9.34
2006	9.48
2007	9.48
2008	9.4
2009	10.06
2010	9.74
2011	9.45
2012	9.51
2013	9.01
2015	8.71
2016	9.42
2017	8.88
2019	9.78
2020	10.49
2021	10.34