SIPRI publishes the 2012 yearbook on the status of conflict, armaments, arms control and disarmament in the world.

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STOCKHOLM INTERNATIONAL PEACE RESEARCH INSTITUTE (SIPRI) is an independent international institute dedicated to research into conflict, armaments, arms control and disarmament. Established in 1966, SIPRI provides data, analysis and recommendations, based on open sources, to policymakers, researchers, media and the interested public.

SIPRI Yearbook 2012 presents a combination of original data in areas such as world military expenditure, international arms transfers, arms production, nuclear forces, armed conflicts and multilateral peace operations with state-of-the-art analysis of important aspects of arms control, peace and international security. The SIPRI Yearbook, which was first published in 1969, is written by both SIPRI researchers and invited outside experts.

Chapter 7. World Nuclear Forces and chapter 8. Nuclear Arms Control and Non-Proliferation are especially relevant to our cause. Here is a link to an excerpt of the yearbook:

Also, here is this site’s section on the matter: