ごうけいとくしゅしゅっしょうりつ
合計特殊出生率
Total fertility rate
1人の女性が15歳から49歳までの間で産む子供の平均の数。値が低くなると人口が減り少子化が進む。
The average number of children a woman gives birth to while she is aged between 15 through 49 years of age. If the number of children a woman gives birth to decreases, the population will decrease and the decline in the birthrate will accelerate.