"UNESCO activities are funded through a combination of assessed contributions by member states to the regular budget; voluntary contributions by member states, organizations, and others to special programs; and funds provided by partners such as other U.N. entities, NGOs, and the private sector. The U.S. share of UNESCO’s regular budget is 22%, the largest among contributing members. Four countries—the United States, Japan (assessed at 15%), Germany (8%), and France (6%)—account for more than 50% of the assessed budget." (Quoted from article)