Year	% of total labor force
1992	1.562063381589521
1995	2.4108992833394325
1996	2.426484427140911
1997	2.3472095146626377
1998	2.4570633993742854
1999	2.425515055232697
2000	2.4867224482748846
2007	2.0120282969537464
2008	1.9849838999615825
2009	1.89453703300465
2010	1.910867109104679
2011	1.8901111623554956
2012	1.863279526304208
2013	1.8303876035219688
2014	1.7955962607440077
2015	1.7788345267529448
2016	1.8809644954877118
2017	1.748393024252983
2018	1.8438729888512047
2019	1.712300506675909
2020	1.6741725402219954