Based on a comparison of 141 countries in 2023, Ireland ranked the highest in GDP per unit of energy use in constant PPP prices per kg of oil equivalent with USD 27.6 followed by Hong Kong and Malta. On the other end of the scale was Trinidad and Tobago with USD 2.77 , Turkmenistan with USD 3.51 and Dem. Republic of the Congo with USD 3.54 .
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