Year	%
1999	3
2001	3.2
2002	3.3
2003	3.7
2004	3.1
2005	3.3
2006	3.7
2007	3.5
2008	3.9
2009	4
2010	3.9
2011	3.8
2012	3.8
2013	3.6
2014	3.5
2015	3.4
2016	3.3
2017	3.5
2018	3.3
2019	3.7
2020	4.4
2021	4
2022	3.9