curl --request GET \
  --url https://api.example.com/api/trade/v1/get-customs-revenue

{
  "months": [
    {
      "recordDate": "<string>",
      "fiscalYear": 123,
      "calendarYear": 123,
      "calendarMonth": 123,
      "monthlyAmountBillions": 123,
      "fytdAmountBillions": 123
    }
  ],
  "fetchedAt": "<string>",
  "upstreamUnavailable": true
}