Rydym yn defnyddio mynegeion prisiau, megis y Mynegai Prisiau Defnyddwyr (CPI) i asesu chwyddiant - mesuriad o'r gyfradd cynnydd mewn prisiau ar gyfer nwyddau a gwasanaethau. Un modd o ddeall y CPI yw meddwl am fasged siopa fawr sy'n cynnwys detholiad o'r nwyddau a'r gwasanaethau a brynir gan aelwydydd. Mae'r CPI yn amcangyfrif newidiadau i gyfanswm cost y fasged hon.
The Consumer Prices Index including owner occupiers’ housing costs (CPIH) 12-month inflation rate was 1.8% in January 2020, increasing from 1.4% in December 2019.
The largest contribution to the CPIH 12-month inflation rate in January 2020 came from housing, water, electricity, gas and other fuels (+0.55 percentage points), which increased by 0.19 percentage points since December 2019.
The largest upward contributions to the change in the CPIH 12-month inflation rate between December 2019 and January 2020 came from gas and electricity prices; fuels and lubricants; clothing; and airfares.
Price quote data and item indices that underpin consumer price inflation statistics are now published, giving users unprecedented access to the detailed data that is used in the construction of the UK's inflation figures. With effect from January 2017 Consumer price inflation publication, these data are published on a monthly basis showing the latest month.