Statistics
It does look encouraging & if accurate, obviously a welcome trend but remember Mr Disraeli - "Lies, damned lies and statistics."
As lomapaseo says it takes years to develop safe practice but not long to lose it. Be wary of managers using this to deny the effect of pilot fatigue/poisoned cabin air/exhausted engineers etc.
Having made the industry safe we need to keep it that way and the first place complacency will emerge is in the boardroom.