{
  "fields": [
    {
      "name": "year",
      "type": "integer",
      "title": "Year"
    },
    {
      "name": "coal_type",
      "type": "string",
      "title": "Coal type"
    },
    {
      "name": "total_net_output_tonnes",
      "type": "number",
      "title": "Total Net Output (tonnes)"
    }
  ],
  "missingValues": [
    ""
  ],
  "primaryKey": [
    "year",
    "coal_type"
  ]
}