message_ix_models.model.transport.operator.sales_fraction_annual

message_ix_models.model.transport.operator.sales_fraction_annual(age: AnyQuantity) → AnyQuantity

Return fractions of current vehicle stock that should be added in prior years.

Parameters:

age (genno.Quantity) – Mean age of vehicle stock. Must have dimension “y” and at least 1 other dimension. For every unique combination of those other dimensions, there must be only one value/\(y\)-coordinate. This is taken as the rightmost end of a uniform distribution with mean age given by the respective value.

Returns:

Same dimensionality as age, with sufficient \(y\) coordinates to cover all years in which. Every integer year is included, i.e. the result is not aggregated to multi-year periods (called year in MESSAGE).

Return type:

genno.Quantity