year on year

Related to year on year: Year to date

year on year

At the same point each year when compared with the previous year. Hyphenated is used as a modifier before a noun. The company reported a 53% increase in profits year on year. Despite clear and robust growth in the economy, year-on-year unemployment rates remain largely uncharacteristically high.
See also: on, year
Farlex Dictionary of Idioms.

ˌyear on ˈyear

(business) (used especially when talking about figures, prices, etc.) each year, compared with the last year: Spending has increased year on year. a year-on-year increase in unemployment
See also: on, year
Farlex Partner Idioms Dictionary
See also:
  • year in, (and) year out
  • year in, year out
  • year round
  • by the year
  • calendar
  • calendar year
  • the turn of the year
  • year after year
  • big year
  • since