Although the numbers between April and October were generally greater than the previous seven years, performance improved from December, with numbers lower than the last six years.
Er bod y niferoedd rhwng Ebrill a Hydref yn fwy ar y cyfan na'r saith mlynedd flaenorol, gwnaeth perfformiad wella o fis Rhagfyr, gyda'r niferoedd yn is na'r chwe blynedd ddiwethaf.