生産 せいさん年齢 ねんれい人口 じんこうじゃなかったです
seisan nenreijinkōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 生産年齢人口

1. Was not working-age population.; Was not of working age.

Past/Perfective
Negative
Polite
Casual Register