World Customs Organization
以下でアクセス： 19 2月, 2016
The survey analysis was broken down by the WCO’s six geographic regions: Middle East and North of Africa (MENA); West and Central Africa (WCA); East and Southern Africa (ESA); Americas and Caribbean (AMS); Europe (EUR); and Asia Pacific (AP). Out of 179 members, 114 Customs administrations (63.7%) have responded to the survey. The highest response rates were the EUR and ESA regions.