This compares with a mixture of positive and negative UPC in England from mid-2012 to mid-2021, resulting in a cumulative UPC of 18,300.
Mae hyn yn cymharu â chymysgedd o UPC cadarnhaol a negyddol yn Lloegr o ganol 2012 i ganol 2021, gan arwain at UPC cronnol o 18,300.