Year	% of total labor force (national estimate)
1994	4.779144358825421
2000	4.9446842171847765
2005	5.542457956151562
2009	5.5509124516567665
2010	4.55405134335153
2012	4.746663740231982
2013	4.949567431546576
2014	5.024144860897694
2018	6.248519325288486
2019	6.202795201432018
2020	6.821433446389154
2021	6.411595771872847