Summary

{
    "vessels": {
        "filtered_count": 0
    },
    "average_age": {
        "unit": "years",
        "value": 13.8
    },
    "total_dwt": {
        "unit": "kt",
        "value": 0,
        "vessels_with_data": 0
    },
    "flag_states_count": 0
}