Year	%
1993	7.9
1995	5.52
1996	5.09
1997	5.23
1998	5.12
1999	5.45
2000	3.93
2001	3.13
2002	2.73
2003	3.37
2004	3.51
2005	2.59
2006	2.26
2007	3.8
2008	2.84
2009	4.28
2010	4.75
2011	6.56
2013	7.78
2015	9.56
2016	9.11
2017	11.99
2018	6.5
2019	9.19
2020	9.36
2021	7.09