Year	%
1996	18.42
1999	15.64
2000	16.08
2001	9.76
2002	10.05
2003	9.64
2006	7.87
2007	9.15
2008	7.22
2009	9.72
2010	7.83
2011	7.13
2012	6.96
2013	8.73
2015	7.91
2016	7.29
2017	7.25
2018	3.32
2019	8.05
2020	5.85
2021	3.96