It is based on a three-point scoring system that scores aid as principal (with regard to targeting gender equality), significant (i.e. gender-mainstreamed), or not targeted. The data generated by the DAC gender equality policy marker provide an estimate of aid in support of gender equality, but are not an exact quantification. The infrastructure covered in this study includes the four sectors of transport and storage, energy, communications and water and sanitation. Overall, donors committed over USD 6.7 billion to gender equality, representing 28% of total aid, in these four sectors on average per year.