Year	% of total labor force
1991	2.147431342412489
1992	2.0133565143015693
1993	1.9048681568045773
1994	1.7507903833708491
1995	2.5057254099433806
1996	2.4309082004185236
1997	2.37536830076345
1998	2.296086481753316
1999	2.360284948163786
2000	2.353334208209785
2001	2.0048572972391874
2002	1.9781273509368764
2003	1.8843084012178064
2004	1.7705044466518656
2005	1.7191993145634046
2007	1.6192513328374911
2008	1.6053927716382068
2009	1.6859964898733197
2010	1.708073745765716
2011	1.6580767904962614
2012	1.6286575556672076
2013	1.5711167995111455
2014	1.5201380310509287
2015	1.484807402398546
2016	1.4449109459615572
2017	1.370936961936149
2018	1.3213733661142317
2019	1.303912572385996
2020	1.183559587650744