Year	%
1999	7.36
2000	7.61
2001	7.43
2002	5.83
2003	5.91
2004	5.91
2005	7.15
2006	6.81
2007	7.08
2008	7.02
2009	6.94
2010	5.96
2011	6.59
2012	6.59
2013	7.76
2014	4.82
2015	5.07
2016	5.09
2017	6.63
2018	6.28
2019	6.24
2020	5.97
2021	6.01