It is worth noting that despite these predictions, improvements in life expectancies have stalled since around 2011 and there has been little change in recent years.
Mae'n werth nodi, er gwaethaf y rhagfynegiadau hyn, bod gwelliannau mewn disgwyliadau oes wedi aros yn eu hunfan ers tua 2011 ac ychydig o newid a fu yn ystod y blynyddoedd diwethaf.