Why 40,000 People Die for Every 1% Increase in Unemployment - The Big Short

The big short was a fantastic movie, for finance nerds and regular viewers alike. One of the lines that stood out the most, amongst many memorable lines, was the claim that for every 1% increase in unemployment 40,000 people die.  
This is an incredibly significant claim, that adds even more weight to the already significant societal issues that come along with people out of the job.  So is this claim actually true?
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