fillna with 0 during series resample
fillna with 0 during series resample


Former-commit-id: 23e81ac0918bcf37ea6c09d3dd36a4ef5701a94a
Former-commit-id: 4cd6389d7be51a61231c3d8301070a288d91bada
dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy