Year	%
1993	6.41
1994	9.83
1995	9.54
1996	9.13
1997	8.29
1998	10.02
1999	10.38
2000	7.87
2001	8.27
2002	9.84
2003	7.77
2004	7.52
2005	6.65
2006	5.71
2007	5.98
2008	5.69
2009	5.55
2010	4.97
2011	4.67
2012	4.79
2014	4.61
2015	5.33
2016	6.29
2017	6.04
2018	7.04
2019	26.47
2020	7.12
2021	4.34