Year	%
1998	7.96
1999	7.44
2000	6.89
2001	8.76
2002	9.58
2003	10.61
2004	9.44
2005	10.75
2006	15.06
2007	14.45
2008	14.93
2009	16.53
2010	18.11
2011	15.63
2012	16.31
2013	16.05
2014	16.34
2015	18.49
2016	17.15
2017	16.29
2018	13.09
2019	14.05
2020	11.97
2021	14.15