Year	%
2000	7.44699613954302
2001	6.86304493839543
2002	6.83986069928731
2003	6.66696556319109
2004	6.515892767087
2005	6.22071372959199
2006	6.02542706663367
2007	6.44016943151722
2008	6.38435760808627
2009	6.39917796035084
2010	6.12286060505998
2011	6.01455336746869
2012	5.66701934207538
2013	5.69228185984544
2014	5.56967787118123
2015	5.43841994615407
2016	5.27483128867689
2017	5.74409508921777
2018	5.5304411281345
2019	5.40977147750782
2020	5.34928906586447