Year	% of total labor force
1991	0.7247164546871037
1992	0.7036440317114271
1993	0.683966591944945
1994	0.6668282296205861
1995	1.171303074670571
1996	1.293337037256304
1997	1.533996757202204
1998	1.5712937893390857
1999	1.537801466755039
2000	1.5058343552092583
2001	1.4121577918843948
2002	1.4669646808102481
2003	1.6316914398615565
2004	2.042384944348908
2005	2.0131989008241358
2006	1.9834333352158284
2007	1.9574568421857947
2008	1.93330995651676
2009	2.3001023106876834
2010	2.272311841393201
2011	2.2489633027640648
2012	2.2293886133146295
2013	2.210919320575733
2014	2.1900198677491773
2015	2.175193902215571
2016	2.12712224367674
2017	1.4652461279889875
2018	1.425049120140707
2019	1.3964582328070432
2020	1.371322391894799