Year	% of total labor force
1991	34.61117660962499
1992	32.56168704544437
1993	33.2310641859271
1994	33.29064867173145
1995	32.557666646025424
1996	32.212998761590164
1997	32.16182368419474
1998	35.47204112178464
1999	33.22169236371407
2000	33.11728036662412
2001	33.090348123108235
2002	33.08091090090726
2003	33.07502986668453
2004	33.06936586003476
2005	33.0624785463167
2006	33.06448120154685
2007	33.07807405413982
2008	33.09943344376915
2009	33.12446122189204
2010	33.14011800632598
2011	33.46957707982764
2012	32.43167459936269
2013	34.039958251120964
2014	33.721403396191086
2015	34.53667792979607
2016	34.46551208712843
2017	35.15601717961976
2018	33.69756652501279
2019	34.337687927758935
2020	33.07265900702286
2021	33.50365391648783
2022	32.91686586137871
2023	33.1790816423797