Year	%
2000	25.696445027058925
2001	25.506736437882193
2002	25.270245226572204
2003	24.72873677600755
2004	23.60629843418834
2005	23.652890265440515
2006	23.88591179370963
2007	24.047201927010413
2008	24.113710104660868
2009	23.955296782010276
2010	24.27094512016868
2011	24.271526407806174
2012	24.021877616392302
2013	23.188650629236374
2014	22.600148771800836
2015	23.023594671813125
2016	22.976518918430003
2017	22.657897338099517
2018	22.481789087020886
2019	22.36507240769312