SizeSection

{
    "deadweight_tonnage": {
        "unit": "t",
        "vessels_with_data": 0,
        "items": [
            {
                "label": "string",
                "count": 0,
                "percentage": 0
            }
        ]
    },
    "gross_tonnage": {
        "unit": "gt",
        "vessels_with_data": 0,
        "items": [
            {
                "label": "string",
                "count": 0,
                "percentage": 0
            }
        ]
    }
}