Use age instead of agem in _af_nbenf.
Use age instead of agem in _af_nbenf.

benjello/openfisca-france,SophieIPP/openfisca-france,adrienpacifico/openfisca-france,SophieIPP/openfisca-france,sgmap/openfisca-france,antoinearnoud/openfisca-france,sgmap/openfisca-france,adrienpacifico/openfisca-france,benjello/openfisca-france,antoinearnoud/openfisca-france