ftry rts thr ffrt shfts. vr th lst yr, 200 ts hv urr t th ftry. Sm f ths b ttrbut t lst rt t usf wrkg ts, whrs th thrs r urlt t wrkg ts. h fllwg tbl gvs th rtg f ts fllg h ty f t-shft tgry shft usf ts urlt t wrkg ts