https://www.confiduss.com/en/jurisdictions/tonga/economy/industry/ - Industry of Tonga

Major industries in the country are tourism, construction, fishing. The Industrial Production growth rate of Tonga is 2.5%.1.2% of population in the country are unemployed. The total number of unemployed people in Tonga is 1,308. Tonga produces 48 GW/h of electricity each year. Tonga emits 1 metric tons per capita of CO₂. On average, you would pay 1.18 USD for one liter of gasoline in Tonga. One liter of diesel would cost 1.01 USD.