Rwy'n sylwi, dros y ffin yn Lloegr, fod dangosfwrdd sy'n cyhoeddi data byw ar ôl ychydig wythnosau'n unig, fel y gall pobl, gan gynnwys ysgolion eu hunain, gymharu eu hunain â'u cymheiriaid.
I notice that, over the border in England, there is a dashboard that publishes live data in arrears by just a few weeks, so that people, including schools themselves, can compare themselves with their peers.