var json = [
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    "name": "Andrew",
    "value": 95.77,
    "category": "A"
  },
  {
    "name": "Matthew",
    "value": 103.62,
    "category": "A"
  },
  {
    "name": "Mark",
    "value": 94.2,
    "category": "A"
  },
  {
    "name": "Luke",
    "value": 91.06,
    "category": "A"
  },
  {
    "name": "John",
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    "category": "A"
  },
  {
    "name": "Jimmy",
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    "category": "B"
  },
  {
    "name": "Bill",
    "value": 64.37,
    "category": "A"
  },
  {
    "name": "Bob",
    "value": 54.95,
    "category": "A"
  },
  {
    "name": "Kate",
    "value": 74.93,
    "category": "A"
  },
  {
    "name": "Alice",
    "value": 35.13,
    "category": "A"
  },
  {
    "name": "Sally",
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  },
  {
    "name": "Mary",
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  },
  {
    "name": "Jenny",
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    "category": "A"
  },
  {
    "name": "Barbara",
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    "category": "A"
  }
];