Brexit, the loss of migrant workers, the pandemic have all played a part and, for the first time, vacancies outweigh the number of people looking for work.
Mae Brexit, colli gweithwyr mudol, a’r pandemig, i gyd wedi chwarae’u rhan yn hynny o beth ac, am y tro cyntaf, mae mwy o swyddi gwag nag o bobl sy'n chwilio am waith.