Just looking at recent years, the change in age specific birth rates has been drastic.

仅从近年来的情况来看，各年龄段人口出的变化是巨大的。

And birth rates for women in their teens and 20s reached record lows.

十几岁和二十几岁女性的创最低记录。

After the war there was a bulge in the birth rate.

战后出一度激增。

Which of these nations has the lowest birth rate?

下哪个国家出最低？

Leaders also feared abortion was contributing to the fall of birth rates among white women.

同时也担心堕胎会降低白人。

So far, boosting Japan's birth rate has been a losing battle.

到目前为止，提高日本的出一直是一场失败的战斗。

Prince Edward Island, it has an aging population and a declining birth rate.

爱德华王子岛，面临着人口老龄化和出下降的挑战。

All of these groups continue to have above-average birth rates.

所有这些族群出将继续维持在平均上。

Birth rates continued to fall for teenagers and women in their 20s.

青少年和20多岁女性的继续下降。

Experts say there are many reasons for falling birth rates.

专家说，出下降的原因有很多。

However, other experts say it is more likely that birth rates will fall.

然而，其他专家说出更有可能下降。

Health experts say there is no single explanation for the falling twin birth rates.

健康专家表示，双胞胎出下降没有单一的解释。

But from 2014 to 2018, the twin birth rates fell 4 percent.

但在2014年至2018年，双胞胎出下降了4%。

But over the years birth rates fell. Families began to have fewer and fewer children.

但是这些年出下降了，人们要的孩子数开始越来越少。

And that other problem is an incredibly low birth rate.

另一个问题是出极低。

It will also help to increase the country's declining birth rate.

这也将帮助提高国家不断下降的出。

A government report found the U.S. birth rate fell four percent in 2020.

一份政府报告发现，2020年美国出下降了4%。

The nation's birth rate has also been going down for years.

多年来，该国的出也一直在下降。

That means the effects of a falling birth rate are an even bigger problem.

这意味着出下降的影响是一个更大的问题。

South Korea, however, is not the only nation concerned about falling birth rates.

然而，韩国并不是唯一一个担心出下降的国家。