~이 최저/최고를 기록하다

When you want to say A가 최저/최고를 기록하다 (A being a statistical index like unemployment rates), you could say "A hits its lowest/highest level" or "A is at its lowest/highest level."

A lot of people say "A records its lowest" but this is not correct. You could say "area/person/thing records its lowest/highest rate" instead.

Take a look at the following examples.

• The divorce rate among young adults has been falling continuously over the past 10 years, and is now at its lowest level since 1990
  
• The average interest on a 20-year, fixed-rate mortgage hits its lowest level in 5 years
• State revenues usually decrease when unemployment hits its highest rate
• Seoul records the highest number of car thefts in Korea, and, understandably, it has the highest auto-insurance rates
• Our evening news recorded the lowest viewership in 4 years. We need to do something about it or my boss will kill me!