Year	%
1996	10.54
1997	11.24
2000	9.34
2001	9.39
2002	10.42
2008	4.58
2009	4.99
2010	3.72
2011	3.8
2012	3.75
2013	4.16
2014	3.27
2015	2.76
2016	2.4
2017	1.89
2018	2.22
2019	2.38
2020	2.34
2021	2.23