Extend top and bottom range of Economic EfficiencyIMPLEMENTED
Proposed Change: Allow Economic Efficiency rating to exceed 0-100, reverting to the system used pre-2016. Nations with scores between 0-100 are unaffected. This fixes a problem with very large numbers of nations hitting either extreme and not tie-breaking sensibly. There will be no theoretical lower/upper limit, but the plausible min/max is around -5/105. Nations' Economy rating on their front page and default Trend page are unaffected.