Year	% of total labor force
1991	0.5552803780703026
1992	0.5469999515681363
1993	0.5338806039539218
1994	0.5218101569196064
1995	0.9029504834849126
1996	0.8959864376548528
1997	0.8726436159377463
1998	0.8462680947978387
1999	0.821875531934827
2000	0.8165227588311147
2001	0.7395224614173866
2002	0.7581727432558057
2003	0.7515402687061032
2004	0.7765035602512013
2005	0.8369153174859281
2006	0.7376142380274882
2007	0.7211001242350497
2008	0.7150846374056564
2009	0.740816468533526
2010	0.7375876302161741
2011	0.7387651439218931
2012	0.7436227030069039
2013	0.7332179233747165
2014	0.7156831162963669
2015	0.7207665364655383
2016	0.7456988070549855
2017	0.7355312943023136
2018	0.7213009264771342
2019	0.7150414564896468
2020	0.6993689402420474