The UNEX measurement is carried out continuously. The system’s statistical design represents the real flows, patterns and characteristics of international mail. The accuracy of the country-to-country quality of service results presented in this report ranges between 1 and 5 per cent on a yearly basis, within a 95 per cent level of confidence.In 2003, European Postal operators achieved the highest J+3 performance on an annual basis since the measurement began in 1994. European Postal operators continue to perform, on average, far above the objectives set by the European Union. The figures presented in this report demonstrate, once again, the continuous and successful commitment of the European Postal operators to providing customers with consistently reliable postal service of a high quality.continue to perform far above the objectives set by the European Union.