Age Structure of Indian Union

The Registrar General, India has published the population of post-Partition India as from 1901, but not its age structure, which occupies such an important position in demographic studies. S.B. Mukherjee has given the age-sex distribution of the Indian Union-since 1881 according to 1971 layout by States and Union Territories in his book 'The Age Distribution of the Indian Population 1881-1961' by reconstructing the data from the district level, a tremendous task indeed.