Ratio. Positive integer used to compute the number of
occurrences of a disjunct in a market scenario. If disjunct i
has ratio mi, then n occurrences of the or-dependency in the
contract period correspond to n ∗ (mi∕∑jmj) occurrences of
point i in the contract period. For example, in figure B.2, there
are n occurrences of the or-dependency in the contract period
exactly if there are n ∗ (mi∕(m1+ m2+ m3)) of disjunct mi.
Default value is 1.