Year	%
1989	7.43632
1990	7.448779
1991	6.880548
1992	7.246499
1993	6.362529
1995	13.44097
1996	14.02975
1997	14.1326
1998	15.08398
1999	13.40543
2000	13.17543
2001	13.5293
2002	13.37968
2003	12.51816
2004	12.33872
2005	11.39836
2006	11.29889
2007	11.89698
2008	10.21107
2009	10.21
2010	9.981192
2011	10.80362
2012	10.19866
2013	10.33102
2014	10.66085
2015	10.16535
2016	10.13118
2017	10.68281
2018	9.839166
2019	10.60377
2020	10.33121
2021	10.20189