It may sound strange, but it's a standard term in demographic statistics.

"Economically active population ("usually active" or "currently active" (currently active is also known as "the labour force")) comprises all persons of either sex above a specified age who furnish the supply of labour for the production of economic goods and services (employed and unemployed, including those seeking work for the first time), as defined by the System of National Accounts (SNA), during a specified time reference period. The economically active population may be related to the total population for the derivation of the crude participation rate, or, more appropriately, to the population above the age prescribed for the measurement of the economically active population"