Year	%
2000	3.3
2001	2.9
2002	3
2003	3.3
2004	3.2
2005	3.7
2006	4
2007	4
2008	4.3
2009	4.4
2014	3.5
2015	3.3
2016	3.4
2017	3.8
2019	3.5