United States - Relative Importance Weights (Contribution to the Total Industrial Production Index): Utilities: Hydroelectric Power Generation (NAICS = 221111) was 0.27% in January of 2024, according to the United States Federal Reserve. Historically, United States - Relative Importance Weights (Contribution to the Total Industrial Production Index): Utilities: Hydroelectric Power Generation (NAICS = 221111) reached a record high of 0.43 in May of 2020 and a record low of 0.05 in February of 1972. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Relative Importance Weights (Contribution to the Total Industrial Production Index): Utilities: Hydroelectric Power Generation (NAICS = 221111) - last updated from the United States Federal Reserve on April of 2024.