Year	%
1997	13.17
1999	13.15
2000	2.43
2001	2.43
2002	2.48
2003	1.75
2004	1.51
2005	1.44
2006	1.23
2007	1.08
2008	2.14
2009	2.15
2010	2.09
2012	1.93
2013	1.93
2018	1.26
2019	1.31
2020	2.25
2021	2.26