##HTML## The chained volume series at previous year prices is obtained from the 2018 average index referenced to the series at current prices of that year. Provisional figures for year (t-2), where (t) is the current year. Preliminary figures for years (t) and (t-1), where (t) is the current year. For further details about the chained index chained index method, visit [a href=https://www.bcentral.cl/contenido/-/detalle/estudio-economico-estadistico-n-90 target="_blank"] https://www.bcentral.cl/contenido/-/detalle/estudio-economico-estadistico-n-90 [/a]