Year	% of total labor force
1992	1.2407148006109279
1993	1.3595031210307364
1994	3.0033296915179966
1995	4.142397986658762
1996	3.990289384805333
1997	4.1922468175005
1998	3.7553162922050265
1999	3.7679810271072984
2000	2.9400848245749387
2001	2.999791409853129
2002	3.1920076608183865
2003	3.1983256484675393
2004	3.4379089094461808
2005	3.434034647307121
2006	3.2856908164941676
2007	2.9251720105612637
2008	2.9227537071999254
2009	3.818913276238621
2010	3.8125841091977706
2011	3.823087888209232
2012	3.395456588638014
2013	3.408593125749318
2014	3.4245643793691967
2015	3.441834055931556
2016	3.4605514751745954
2017	3.4790066796928247
2018	3.4921648130045924
2019	3.466023070981323
2020	3.3853476391882085