Note that the 'Welsh for Adults' StatsWales information normally included as part of this release cannot be updated to 2016/17.
Nodwch nad yw'n bosibl diweddaru gwybodaeth StatsCymru ynghylch Cymraeg i Oedolion, sy'n arfer cael ei gynnwys fel rhan o'r datganiad hwn, i 2016/17.