Year	%
1993	8.9
1999	9.82
2000	7.39
2001	4.87
2002	4.85
2003	4.8
2004	4.9
2005	4.83
2006	4.81
2007	4.68
2008	4.65
2009	4.61
2011	3.78
2012	3.79
2013	3.24
2014	3.3
2015	3.31
2016	3.29
2017	3.3
2021	2.19