text: For ‘Decision authority’ and ‘Skill discretion’, the authors found a stable situation since 1995, even a 
  small rise of skill discretion for manual workers after 2010. Regarding ‘Psychological demands’ and ‘Job 
  strain’, the major increase for all groups took place between 1995 and 2005. This growth decelerated 
  after 2005, this observation is also valid for other working conditions, like work intensity. 