training and development expenses reduced by 17.4 per cent between 2010 and 2018 and increased by 8.1 per cent between 2019 and 2021.
syrthiodd costau hyfforddiant a datblygiad 17.4 y cant rhwng 2010 a 2018 a chynyddodd 8.1 y cant rhwng 2019 a 2021.