United States - Relative Importance Weights (Contribution to the Total Industrial Production Index): Materials Excluding Energy Materials was 27.54% in March of 2024, according to the United States Federal Reserve. Historically, United States - Relative Importance Weights (Contribution to the Total Industrial Production Index): Materials Excluding Energy Materials reached a record high of 37.47 in December of 1973 and a record low of 24.94 in January of 2009. 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): Materials Excluding Energy Materials - last updated from the United States Federal Reserve on April of 2024.