Year	% of total labor force
1991	34.984145396930934
1992	35.700445950756645
1993	36.421441917998635
1994	37.14718387503789
1995	37.87947744783691
1996	37.949900468680475
1997	38.263730197947595
1998	38.795519639777254
1999	39.466899627776705
2000	40.193869389399644
2001	40.9228978951724
2002	41.604293125123895
2003	41.81093823287524
2004	42.21147136568919
2005	42.7140179404541
2006	42.718896849095074
2007	42.81677694119782
2008	42.681408996923714
2009	42.95109417382943
2010	42.60094224125055
2011	42.24158862550113
2012	42.094804609276274
2013	42.123944602019456
2014	42.21714081183937
2015	42.55596850906706
2016	42.720140163524434
2017	43.23232983218859
2018	43.43548588982715
2019	43.758239785707396
2020	42.73408529002654
2021	43.14049924066338
2022	43.539239445304
2023	43.49004191434733