Year	% of total labor force
1991	0.6111782982809846
1992	0.5921877116608423
1993	0.5945678792135354
1994	0.5908781705230084
1995	0.5495825638590278
1996	0.5283632863383544
1997	0.5071226189775099
1998	0.4912210868852843
1999	0.47609452595728785
2000	0.46516010452982454
2001	0.5965339639218575
2002	0.5803807635895029
2003	0.5099489393062062
2004	0.466640534796718
2005	0.5058696443969878
2006	0.490428594351168
2007	0.47508322483569426
2008	0.46088416964508133
2009	0.42701665502701913
2010	0.41578182631049515
2011	0.4048803317406589
2012	0.3944293010924843
2013	0.38431641886522516
2014	0.3744416591711231
2015	0.36482978140811745
2016	0.35544480286190394
2017	0.3723952349795313
2018	0.34658887591247234
2019	0.353820482809278
2020	0.34749092440578183