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    {
      "type": "area_hollow",
      "fill-alpha": 0.35,
      "values": [
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        162,
        150,
        170,
        190,
        190,
        190,
        200,
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      ],
      "colour": "#688F11",
      "dot-size": 3,
      "text": "Population",
      "font-size": 12
    }
  ],
  "title": {
    "text": "World Population Estimates",
    "style": "{font-size: 20px; color: #778877; text-align: center;}"
  },
  "y_legend": {
    "text": "Population in millions",
    "style": "{font-size: 22px; color: #778877}"
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    "labels": {
      "labels": [
        "10000 BC",
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        "7000 BC",
        "6000 BC",
        "5000 BC",
        "4000 BC",
        "3000 BC",
        "2000 BC",
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        "400 BC",
        "200 BC",
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        "200 AD",
        "400 AD",
        "500 AD",
        "600 AD",
        "700 AD",
        "800 AD",
        "900 AD",
        "1000 AD",
        "1100 AD",
        "1200 AD",
        "1250 AD",
        "1300 AD",
        "1340 AD",
        "1400 AD",
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        "1600 AD",
        "1650 AD",
        "1700 AD",
        "1750 AD",
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        "1900 AD",
        "1910 AD",
        "1920 AD",
        "1930 AD",
        "1940 AD",
        "1950 AD"
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  },
  "y_axis": {
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    "min": 0,
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