noun
arrest rate; clear-up rate; crime-arrest ratio
Used in crime statistics to indicate the proportion of reported crimes that result in an arrest or clearance.
今年の検挙率は昨年より上がった。
The arrest rate this year is higher than last year.
警察は検挙率の向上に力を入れている。
The police are focusing on improving the clear-up rate.
犯罪率 is the crime rate (incidence of crime), whereas 検挙率 is the rate at which crimes are solved or arrests are made.
Compound of 検挙 (arrest, apprehension) and 率 (rate, ratio).