Meaning of 激減 in Japanese

Definition of 激減

げきげん(gekigen) 【激減】

(n, vs) dropping sharply; decreasing rapidly
先進国では虫歯が激減し、自分の歯で一生食べられる人が増えています。
Cavities have become rarer in the developed countries and more people will be able to eat with their own teeth throughout their life.

先進国せんしんこくでは虫歯むしばが激減げきげんし、自分じぶんの歯はで一生いっしょう食べられる人ひとが増えています。

Cavities have become rarer in the developed countries and more people will be able to eat with their own teeth throughout their life.