Data & Sources
Explore the facts, figures, reports, and original sources behind our research. See where the information comes from and examine the evidence yourself.
Data
National infrastructure networks, 1951–2024
Published series for railway route length, national highway length and installed power capacity. The record links to the publishers.
Data
School education by state, 1961–2022
Published enrolment, teachers in post and pupil–teacher ratios. The record links to the publishers.
Data
Judicial officers, 1987–2023
Published counts of judicial officers. The record links to the publishers.