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    {
      "grp": "1900–1949",
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    {
      "grp": "1950–1979",
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    {
      "grp": "1980–1999",
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      "grp": "ab 2000",
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    {
      "grp": "unbekannt",
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    }
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      "grp": "Keine Angabe",
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    },
    {
      "grp": "Gepflegt",
      "n": 341
    },
    {
      "grp": "Top-Zustand",
      "n": 112
    },
    {
      "grp": "Neubau",
      "n": 81
    },
    {
      "grp": "Renovierungsbedarf",
      "n": 58
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  "national_med_price": 289000.0,
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      {
        "key": "overall",
        "label": "Gesamt",
        "unit": "€/m²",
        "months": [
          "2023-09",
          "2023-10",
          "2023-11",
          "2023-12",
          "2024-01",
          "2024-02",
          "2024-03",
          "2024-04",
          "2024-05",
          "2024-06",
          "2024-07",
          "2024-08",
          "2024-09",
          "2024-10",
          "2024-11",
          "2024-12",
          "2025-01",
          "2025-02",
          "2025-03",
          "2025-04",
          "2025-05",
          "2025-06",
          "2025-07",
          "2025-08",
          "2025-09",
          "2025-10",
          "2025-11",
          "2025-12",
          "2026-01",
          "2026-02",
          "2026-03",
          "2026-04",
          "2026-05",
          "2026-06",
          "2026-07",
          "2026-08"
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            "label": "Gesamtmarkt",
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              "2023-10",
              "2023-11",
              "2023-12",
              "2024-01",
              "2024-02",
              "2024-03",
              "2024-04",
              "2024-05",
              "2024-06",
              "2024-07",
              "2024-08",
              "2024-09",
              "2024-10",
              "2024-11",
              "2024-12",
              "2025-01",
              "2025-02",
              "2025-03",
              "2025-04",
              "2025-05",
              "2025-06",
              "2025-07",
              "2025-08",
              "2025-09",
              "2025-10",
              "2025-11",
              "2025-12",
              "2026-01",
              "2026-02",
              "2026-03",
              "2026-04",
              "2026-05",
              "2026-06",
              "2026-07",
              "2026-08"
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              95.5,
              95.7,
              89.2,
              90.1,
              90.5,
              90.0,
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              87.3,
              85.9,
              86.0,
              84.5,
              84.4,
              83.3,
              84.3,
              85.9,
              85.7,
              86.2,
              87.1,
              88.5,
              88.8,
              88.2,
              89.0,
              90.7,
              90.8,
              92.2,
              93.8,
              94.9,
              95.3,
              95.1,
              96.3,
              95.5,
              94.1,
              93.6,
              90.8
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        "2023-11",
        "2023-12",
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        "2024-02",
        "2024-03",
        "2024-04",
        "2024-05",
        "2024-06",
        "2024-07",
        "2024-08",
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        "2024-10",
        "2024-11",
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        "2025-03",
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        "2025-08",
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        "2025-11",
        "2025-12",
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        "2026-02",
        "2026-03",
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        95.1,
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        90.8
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      "key": "size",
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        {
          "label": "80–120 m²",
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        {
          "label": "über 120 m²",
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          "delta": 21
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      "key": "energy",
      "label": "Energieklasse",
      "unit": "€/m²",
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          "label": "Effizient (A–B)",
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      "key": "type",
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          "delta": -8
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}