{"series": {"id": 122, "slug": "marches-mm-plomb-nom", "title": "Plomb nom", "label": "Plomb nom", "sector": {"id": 10, "name": "Marchés mondiaux"}, "unit": "USD/t", "multiplier": 1, "frequency": "A", "coverage": {"start": "1960-01-01", "end": "2023-12-31"}, "url": "/data_show/122/", "api_url": "/api/series/marches-mm-plomb-nom/", "code": "dde09a67-2a8a-4c87-9cea-d9d30f62783e", "description": "Plomb nom (($/mt) (nominal))", "variable": {"id": 88, "name": "Plomb nom"}, "source": "BM", "source_url": "", "base_period": "", "seasonally_adjusted": null, "methodology_note": "", "keywords": "", "last_observation_date": "2023-01-01", "updated_at": "2026-09-21T05:46:46+00:00"}, "query": {"start": null, "end": null, "base": null, "transform": "level", "freq": null, "method": "mean"}, "frequency": "A", "transform_label": "Niveau brut", "notes": [], "count": 64, "observations": [{"date": "1960-01-01", "period": "1960", "value": 198.85, "status": "final"}, {"date": "1961-01-01", "period": "1961", 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