Year	%
2008	8.16375020057627
2009	4.11916461386066
2010	3.06818623299833
2011	2.76420847054839
2012	3.0769175753146
2013	2.88247142261907
2014	2.54111369062263
2015	2.14279238837218
2016	2.17901822396472
2017	2.31775341068148
2018	3.04108365364652
2019	4.111398726013
2020	4.23551043671952
2021	4.16056244801714