Year	%
1992	7.5
1997	4.05
2001	7.97
2002	9.48
2003	15.08
2004	5.74
2005	6.96
2006	6.94
2007	8.44
2008	6.97
2009	8.23
2012	4.14
2013	4.14
2014	4.14
2015	8.28
2016	8.31
2017	9.52
2018	9.48
2019	9.43
2020	8.84
2021	8.87