curl --request GET \
  --url https://api.voltview.co.uk/v1/sites/annualConsumptionAndEmissions \
  --header 'x-api-key: <api-key>'

[
  {
    "siteId": "<string>",
    "period": "<string>",
    "consumption": 123,
    "emissions": 123,
    "emissionsIntensity": 123,
    "comparisonPeriod": "<string>",
    "previousConsumption": 123,
    "previousEmissions": 123,
    "consumptionChange": 123,
    "emissionsChange": 123
  }
]