The overall trend is the index of market services and index of production have generally increased since 1999, but the index of construction has fluctuated over the same time period.
Y tueddiad ar y cyfan yw bod y mynegai gwasanaethau’r farchnad a chynhyrchu wedi cynyddu ers 1999, tra bo’r mynegai adeiladu wedi amrywio dros yr un cyfnod amser.