There is room to argue about by how much, but nothing is occurring to increase trade and much is happening that might reduce it.
Prin yw'r data ar faint o fusnesau sydd wedi elwa ar yr amddiffyniad hyd yma neu ragfynegiad o faint o fusnesau a pha fath o fusnesau sy'n debygol o elwa ar yr estyniad arfaethedig.