Data are available for 4 years for both the count of transactions (shown by the line, left hand axis) and tax at risk (shown by the bars, right hand axis).
Mae data ar gael am 4 blynedd ar gyfer nifer y trafodiadau (a ddangosir gan y llinell, echelin chwith) a’r dreth sydd mewn perygl (a ddangosir gan y bariau, echelin dde).