Serikat buruh  itu mengatakan 90 persen  dari operasi yang memiliki serikat buruh, tutup, termasuk  salah satu dari tambang-tambang perak  terbesar dunia , milik perusahaan tambang Penoles serta tambang-tambang emas  dan pabrik baja  dan tembaga.
The union said 90 percent of unionized operations were closed, including one of the world's biggest silver mines, owned by mining company Penoles, as well as gold mines and steel and copper plants.