激減 げきげん
gekigen

Noun
Suru Verb

1. dramatic decrease; sharp drop; sudden fall

Intransitive
先進 せんしん こくでは虫歯 むしば激減 げきげん、自分 じぶん 一生 いっしょう べられる ひと えています。
senshinkokudewa mushibaga gekigen shi jibunno hade isshō taberareru hitoga fuete imasu.
Cavities have become rarer in the developed countries and more people will be able to eat with their own teeth throughout their life.