Has vitamin C reduced heart disease deaths since the 70's?

Found the figure below very interesting and unsure what to think about it. Found it on the Vitamin C Foundations website. So clearly they are not impartial (and no one really is). I don't know if other factors have also  impacted the mortality rate... so until I know more I'm not going to say this graph is correct, however it is interesting enough to post. I have a copy of Pauling's book (he was the guy who got the Nobel price for determining the chemical structure of vitamin C ) and can't say I was impressed by it. However apparently vitamin C sales increased (not unsurprisingly) at this point.
   

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