curl --request GET \
  --url https://api.example.com/v1/crm/metrics/efficency/

{
  "count": 123,
  "results": [
    {
      "id": 123,
      "name": "<string>",
      "car": {
        "id": 123,
        "type": "CAR",
        "brand": "<string>",
        "model": "<string>",
        "number": "<string>",
        "tech_passport": "<string>",
        "serial": "<string>",
        "vin": "<string>",
        "extra": "<unknown>"
      },
      "days": 123,
      "days_idle": 123,
      "total": 123,
      "group": 123,
      "unique_id": "<string>",
      "category": 123,
      "image": "<string>",
      "extra": "<unknown>",
      "sublease_user": 123,
      "state": 123,
      "disabled": 0,
      "rental_point": 123,
      "revenue": "0.00",
      "revenue_lost": "0.00",
      "efficency": "0.00"
    }
  ],
  "next": "http://api.example.org/accounts/?page=4",
  "previous": "http://api.example.org/accounts/?page=2"
}