The data will cover a very short period of the coronavirus (COVID-19) pandemic and it will be difficult to fully determine any impacts this may have had until more recent data is available.
Bydd y data'n ymdrin â chyfnod byr iawn o'r pandemig coronafirws (COVID-19) a bydd yn anodd pennu'n llawn unrhyw effeithiau y gallai hyn fod wedi'u cael tan fod data mwy diweddar ar gael.