{"series": {"id": 129, "slug": "marches-mm-zinc-reel", "title": "Zinc reel", "label": "Zinc reel", "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/129/", "api_url": "/api/series/marches-mm-zinc-reel/", "code": "c4da96b9-24cd-4634-b389-d713bc1c6c57", "description": "Zinc reel (($/mt) (réel))", "variable": {"id": 95, "name": "Zinc reel"}, "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": 1286.08, "status": "final"}, {"date": "1961-01-01", "period": "1961", 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