Year	%
2000	2.34
2001	3.03
2002	2.66
2003	2.68
2004	2.53
2005	2.92
2006	2.86
2007	2.75
2008	2.18
2009	2.38
2010	2.99
2011	2.11
2012	1.89
2013	1.84
2014	2.53
2015	2.52
2016	2.31
2017	2.12
2018	2
2019	2.1
2020	2.07
2021	0.69