"It is typically used for annual data. This can also serve cases of multi-annual data (data that appear once every two, three or, possibly, five years). Descriptive information on the multiannual characteristics (e.g. frequency of the series in practice and other methodological information can be provided at the dataflow level, as long as these characteristics are applicable for the entire dataflow)."@en . . "A" . . "Annual"@en . . . .