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  "slug": "charlottenburg",
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  "pct_cellar": 78.5,
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      "grp": "vor 1900",
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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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    {
      "grp": "Keine Angabe",
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  "national_med_price": 289000.0,
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      {
        "key": "overall",
        "label": "Gesamt",
        "unit": "€/m²",
        "months": [
          "2026-05",
          "2026-06",
          "2026-07",
          "2026-08",
          "2026-09",
          "2026-10"
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          {
            "label": "Gesamtmarkt",
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              "2026-06",
              "2026-07",
              "2026-08",
              "2026-09",
              "2026-10"
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              105.2,
              105.3,
              104.4,
              103.4
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      "label": "Gesamtmarkt",
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        "2026-06",
        "2026-07",
        "2026-08",
        "2026-09",
        "2026-10"
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        105.2,
        105.3,
        104.4,
        103.4
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      "key": "rooms",
      "label": "Zimmerzahl",
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          "delta": -4
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        {
          "label": "2 Zimmer",
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        },
        {
          "label": "3 Zimmer",
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        },
        {
          "label": "4 Zimmer",
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        {
          "label": "5+ Zimmer",
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    {
      "key": "size",
      "label": "Wohnfläche",
      "unit": "€/m²",
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          "label": "bis 50 m²",
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        {
          "label": "50–80 m²",
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          "delta": -2
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        {
          "label": "80–120 m²",
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        {
          "label": "über 120 m²",
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          "delta": 15
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      "key": "energy",
      "label": "Energieklasse",
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        {
          "label": "Mittel (C–D)",
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        {
          "label": "Ineffizient (E–H)",
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    {
      "key": "type",
      "label": "Wohnungstyp",
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          "label": "Standard",
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        },
        {
          "label": "Erdgeschoss",
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        {
          "label": "Dachgeschoss",
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    {
      "key": "tenancy",
      "label": "Nutzung",
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          "label": "Eigennutzung",
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          "label": "Vermietet",
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}