: ▁ 4 2 3 . 4 ▁ 2 0 0 6 : ▁ 4 6 4 . 9 ▁ 2 0 0 7 : ▁ 5 2 9 . 7 ▁ 2 0 0 8 : ▁ 6 0 7 . 9 ▁ 2 0 0 9 : ▁ 5 2 7 . 3 ▁ 2 0 1 0 : ▁ 5 6 3 . 4 ▁ ▁The ▁total ▁number ▁of ▁language ▁less ons ▁given ▁during ▁the ▁year ▁ 2 0 1 1 ▁was ▁ 6 , 5 0 6 ▁thousand . ▁The ▁number ▁of ▁language ▁cent ers ▁was ▁ 5 6 3 ▁as ▁of ▁December ▁ 3 1 , ▁ 2 0 1 1 . ▁As ▁of ▁early ▁ 2 0 1 3 , ▁ 7 5 % ▁of ▁its ▁re venue ▁was ▁from ▁English ▁language ▁less ons . ▁ ▁Un ions ▁In ▁Japan , ▁teachers ▁at ▁Berl itz ▁are ▁represented ▁by ▁several ▁un ions . ▁In ▁the ▁K ans ai ▁region ▁they ▁are ▁represented ▁by ▁the ▁General ▁Union , ▁and ▁in ▁the ▁K anto ▁region ▁they ▁are ▁represented ▁by ▁Beg unto , ▁the ▁Berl itz ▁Tokyo ▁General ▁Union , ▁part ▁of ▁the ▁National ▁Union ▁of ▁General ▁Work ers . ▁Both ▁un ions ▁belong ▁to ▁the ▁National ▁Trade ▁Union ▁Council . ▁ ▁In ▁Germany , ▁teachers ▁and ▁office ▁staff ▁are ▁represented ▁by ▁G E W . ▁In ▁November ▁ 2 0 1 0 , ▁management ▁attempted ▁for ▁the ▁first ▁time ▁to ▁cla w ▁back ▁the ▁employee ▁g ains ▁of ▁the ▁past