- 12.0 (official); 30-40 (unofficial) (est.); North Yemeni riyal (YR) = 100 filler Exchange rates: NA Fiscal year: 1 April - 31 March *Montserrat, Communications Highways: 300 km perennially navigable Pipelines: crude oil 1,307 km; natural gas 420 km (1992) Ports: none; landlocked International disputes: all
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