Strike, wage raise - 1997Strike, for better safety - 1999Strike, state regulations regarding labour conditions - 1980Strike, against a wage cut - 1978Strike, against massive lay off - 1983Strike, wage raise - 1999Strike, for better safety - 2001work-to-rule, wage raise - 1976free transport, wage raise - 1981Strike, wage raise - 2005Strike, for better safety - 2003Strike, for better safety - 2003Strike, wage raise - 2003Strike, against a worsening of the pension scheme - 2004Strike, collective agreement demanded by the employees - 2006petition, unknown - 2006Strike, against the results of privatization - 2006Strike, against a wage cut - 1977