Mullikkorame zinc mine was active in Pyhajarvi between the years 1989-2000. During this time 1.2 million tonnes of ore were mined. The ore contained in average 6.08% zinc, 0.30% copper and 17.05 sulphur also one tonne of ore contained 1.01 grams of gold. The ore from the mine was transported to the mine at Pyhasalmi to be enriched. The ore was extracted during the years 1990-1993 and 1996-2000.
Does this next sentence follow, given the preceding text?
They stopped extracting ore in 1994 and 1995 due to bad working conditions.
It's impossible to say