Description of Figure 19: The number of joiners and leavers have been broadly close for most of the last 10 years, with some year-to-year variation.
Disgrifiad o Ffigwr 10: Siart fariau glystyrog sy’n dangos yr amcangyfrif o dai amlfeddiannaeth a’r nifer sy’n hysbys yn y 10 mlynedd ddiwethaf.