Year	% of total labor force
1991	0.6289983327350861
1992	0.6096235168367855
1993	0.5918679708280115
1994	0.46008265384876396
1995	0.7204635156155801
1996	0.7002851938665177
1997	0.6892409136263286
1998	0.6798252179931771
1999	0.6660638731096555
2000	0.6555913620912618
2001	0.5834722874272178
2002	0.6429803371282499
2003	0.4040227527219801
2004	0.35681731926391835
2005	0.41749791572194384
2007	0.5939209378699307
2008	0.5837785156601659
2009	0.5828843412500906
2010	0.5730357862333052
2011	0.35891942492353995
2012	0.3527795153841984
2013	0.3469443650734775
2014	0.3411832289858176
2015	0.33532410437794247
2016	0.3295544423938835
2017	0.34253027111270956
2018	0.32917023699738684
2019	0.3313461907549825
2020	0.3246703783983311