Scott 2010 Standard Postage Stamp Catalogue, Vol. 5: Countries of the World- P-Sl

More than 16,000 value changes appear in Volume 5, which covers the countries of the world from Pakistan through Slovenia. Leading the way in Volume 5, with 2,986 value changes, is Peru. Other countries with large numbers of value changes include El Salvador (1,815), St. Pierre & Miquelon (1,636), Philippines (1,365), Russia (1,320), Rwanda (932), Serbia (726), Singapore (707) and Slovenia (584).