{
  "docId": "019dd923-5de0-76bd-a167-8b49aa23ef54",
  "docSlug": "a2d2d8b8d70b5202",
  "documentTitle": "Perspectives on WMATA's ridership",
  "authorId": "BCG",
  "authorName": "BCG",
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  "nDataPoints": 45,
  "notes": "The chart highlights a growth phase (+1%) followed by a decline (-3%) in total ridership.",
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      "kind": "chart",
      "text": "Stacked bar chart of annual ridership (m) from 2002-2016",
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        "h": 0.03,
        "w": 0.12,
        "x": 0.44,
        "y": 0.85
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      "kind": "legend",
      "text": "Bus (grey), Rail (green)",
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      "kind": "metric",
      "text": "Unlinked Rides Annually (m): 357m",
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      "kind": "source-note",
      "text": "Source: National Transit Database Monthly Module Raw Data Release",
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      "kind": "title",
      "text": "Our starting point: Ridership has slipped in bus & rail",
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      "evidence": "Trend arrows annotated with +1% and -3% growth deltas.",
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      "evidence": "Stacked bar chosen to show bus+rail composition over time.",
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      "evidence": "Title answers 'so what?' — ridership has slipped.",
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