In Wales the gap narrowed by 0.2 percentage points and in the UK, it has narrowed by 0.2 percentage points compared to the previous year.
Mae’r tuedd chwarterol tymor byr yn dangos gostwng o 1.2% ar gostyngiad yn Nghymru o’i gymharu a’r chwarter gyfredol a’r un flaenorol.