This is the 7468th most frequent Korean word.
출산율
Birth rate.
Here, '출산율' (birth rate) is used as a subject to indicate a general trend in population statistics.
출산율이 지속적으로 감소하고 있습니다.
The birth rate is continuously declining.
In this sentence, '출산율' represents an objective that the government wants to improve through its policies.
정부는 출산율을 높이기 위한 정책을 마련하고 있습니다.
The government is preparing policies to increase the birth rate.
Here, '출산율' is used to describe its specific state (low birth rate), highlighting its implications on other areas.