Series will create NaN values if no data given
Series will create NaN values if no data given

ual/urbansim,VladimirTyrin/urbansim,synthicity/urbansim,SANDAG/urbansim,waddell/urbansim,waddell/urbansim,ual/urbansim,waddell/urbansim,apdjustino/urbansim,UDST/urbansim,bricegnichols/urbansim,SANDAG/urbansim,waddell/urbansim,AZMAG/urbansim,synthicity/urbansim,synthicity/urbansim,apdjustino/urbansim,bricegnichols/urbansim,VladimirTyrin/urbansim,bricegnichols/urbansim,synthicity/urbansim,UDST/urbansim,apdjustino/urbansim,VladimirTyrin/urbansim,AZMAG/urbansim,UDST/urbansim,SANDAG/urbansim,UDST/urbansim,apdjustino/urbansim,ual/urbansim,bricegnichols/urbansim,VladimirTyrin/urbansim,ual/urbansim,AZMAG/urbansim,AZMAG/urbansim,SANDAG/urbansim