870 ITU‐T's Technical Reports and Specifications Performance indicators list City services Core indicator Supporting indicator Electricity Percentage of city population with authorized electrical service Total electrical use per capita (kWh/year) Total residential electrical use per capita (kWh/year) The average number of electrical interruptions per customer per year Average length of electrical interruptions (in hours) Finance Debt service ratio (debt service expenditure as a percent of a municipality's own‐source revenue) Tax collected as percentage of tax billed Own‐source revenue as a percentage of total revenues Capital spending as a percentage of total expenditures Governance Percentage of women employed in the city government workforce Urban planning Jobs/housing ratio Areal size of informal settlements as a percent of city area Green area (hectares) per 100,000 population Quality of life Core indicator Supporting indicator Civic engagement Voter participation in last municipal election (as a percent of eligible voters) Citizen's representation: number of local officials elected to office per 100,000 population Culture Percentage of jobs in the cultural sector Economy City product per capita Percentage of persons in full time employment City unemployment rate Environment PM10 concentration Greenhouse gas emissions measured in tonnes per capita Shelter Percentage of city population living in slums Percentage of households that exist without registered legal titles Number of homeless people per 100,000 population Social equity Percentage of city population living in poverty