Year	%
1996	19.92
1999	17.13
2000	17.28
2001	10.88
2002	10.92
2003	10.9
2006	10.59
2007	11.08
2008	9.6
2009	10.93
2010	9.56
2011	8.92
2012	8.92
2013	9.87
2015	8.85
2016	8.78
2017	8.63
2018	8.75
2019	7.75
2020	8.38
2021	8.18