万国邮政联盟（UPU）国际局自 1875 年第一版起便定期发布邮政统计。因此，它保存着由一个国际组织收集的最早的国际统计记录。这些统计不断得到修订与完善，以尽可能贴近邮政部门的期望及其对信息的需求。
The International Bureau of the UPU has published postal statistics regularly since the first edition in 1875. It thus holds the oldest records of international statistics collected by an international organization. These statistics have been amended and improved to meet as closely as possible the postal sector's expectations and need for information.