Year	%
2006	1.35468526139633
2007	0.706313739394777
2008	2.43917634389561
2009	4.88529760273058
2010	6.09051435994959
2011	6.18616016043106
2012	5.32419650931664
2013	4.18395299941896
2014	4.06028937927584
2015	3.4090935422264
2016	3.12490299823087
2017	2.87220812614715
2018	3.04043709116932
2019	2.90386292068208
2020	3.1975723822938
2021	3.22932177772442