Year	% of total labor force
1991	0.9219538914589107
1992	0.8898049809189174
1993	0.8583114590133558
1994	0.8309979845854761
1995	1.1453220428774638
1996	1.1072592462981998
1997	1.0686908756668323
1998	0.6079440861495032
1999	0.5894700046333167
2000	0.5832735104091888
2001	0.5688594407992356
2002	0.5549964623826891
2003	0.6818556322222243
2004	0.7397152761930406
2005	0.7223739809560548
2006	0.7204644690338968
2007	0.708256930116997
2008	0.6788271767102542
2009	0.6443591670884535
2010	0.6134504532938763
2011	0.6166110072464126
2012	0.6118651669443514
2013	0.5534821499239239
2014	0.4907332762298248
2015	0.4770863342574011
2016	0.5698062909626714
2017	0.5526603628143196
2018	0.5178490962912753
2019	0.5228433677205143
2020	0.5467634929343893