{
  "fields": [
    {
      "name": "year",
      "type": "integer",
      "title": "TIME_PERIOD"
    },
    {
      "name": "nuptiality_code",
      "type": "string",
      "title": "NUPT"
    },
    {
      "name": "nuptiality",
      "type": "string",
      "title": "Nuptiality"
    },
    {
      "name": "age_code",
      "type": "string",
      "title": "AGE"
    },
    {
      "name": "age_of_mother",
      "type": "string",
      "title": "Age"
    },
    {
      "name": "births",
      "type": "integer",
      "title": "OBS_VALUE"
    }
  ],
  "missingValues": [
    ""
  ],
  "primaryKey": [
    "year",
    "nuptiality_code",
    "age_code"
  ]
}