The Global Rights Index is a world-wide assessment of trade union and human rights by country. Updated annually in a report issued by the International Trade Union Confederation, the index rates countries on a scale from 1 (best) through to 5+ (worst). Ratings are based on 97 indicators derived from the labour standards of the International Labour Organization. The annual index reports on violations of trade union rights, such as limitations on collective bargaining and the right to strike, inhibiting trade union membership, state surveillance, violence and killings against trade unionists and restrictions on freedom of speech.