Year	% of total labor force
1991	2.8110897490600415
1992	3.257176524973858
1993	2.3393213078457396
1994	1.506004007691808
1995	6.488318187965211
1996	6.284845454486036
1997	7.184565202270921
1998	6.866735410530358
1999	6.592106695909424
2000	6.444608145447645
2001	3.614818871380204
2002	3.2726210984859527
2003	3.1969879045625844
2004	3.1272130733142527
2005	3.0473591521768197
2006	2.9880802194721454
2007	2.933140370576947
2008	2.8853249502810168
2009	2.8518506095402083
2010	2.822345659887431
2011	2.8000864177219564
2012	2.7863567853395397
2013	2.6895844191376375
2014	2.59629217447952
2015	2.5103026732164615
2016	2.4293288182274075
2017	2.348751761410107
2018	2.281159802219987
2019	2.211536090126927
2020	2.197680813901309