1576-59621576-5962S1576-5962201700030017510.1016/j.rpto.2017.07.004Spain0000201700002017333175182201632183-90200720163239-4520153179-89201220197-208201018291-3041991441-26199378111-8200199-302010439-622001952-6919902687-73219701992201531165-732010463-871975195451327-58201531101-720163295-1012012543-691995200388100-1219925139-5519849672-98200085237-49201398875-925201624296-303200760683-729200412356-62201725-47199811145-6520163225-3720163275-852001199617353-6619978230-431998200210117-25200376323-4620152337-44201624209-282003881068-81201588797-834201725267-7520112775-911996831195-20120163217-2320132174-84200317S67-76201524325-492014233-301996122199-2232015Third201420038206-24200861827-68201220297-307198291482-97199144703-42US Department of Labor1991Forth199681525-31199681557-60