这座城市的犯罪率今年大幅下降了。

The city's crime ___rate has significantly decreased this year.

这个国家拥有全球最低的出生率之一。

The country has one of the lowest birth ___rates in the world.

这种新疗法的成功率超过90%。

The success ___rate for this new medical treatment is over 90%.