United Nations Population Division - World Population Prospects

About

World population statistics from 1950.

Access

No bulk download. Can only download data for up to five countries at once. Available in CSV.

Openness

Not open. Copyright page states:

The United Nations' explicit written permission must be obtained in order to:

1. Use all or any part of the Copyrighted Materials for any Commercial Use;
2. Systematically distribute the whole or any part of the Copyrighted Materials to anyone;
3. Publish, distribute or make available the Copyrighted Materials, works based on the Copyrighted Materials or works that combine them with any other material;
4. Alter, abridge, adapt or modify the Copyrighted Materials, except to the extent necessary to make them perceptible on a computer screen.