internal_id[1]=1: Total internal_id[1]=2: Electricity internal_id[1]=3: Heat internal_id[1]=4: Natrual gas internal_id[1]=5: Coal internal_id[1]=6: Heating oil internal_id[1]=7: Renewable energy internal_id[1]=8: other internal_id[2]=0: Real data internal_id[2]=1: Synthetic data