Rebasing is the process of replacing an old base year to compile volume measures of GDP with a new and more recent base year or price structure.
Economies are dynamic in nature: they grow, they shrink, they add new sectors, new products and new technologies, and consumer behaviour and tastes change over time.
Rebasing is used to account for these changes, so as to give a more current snapshot of the economy. Download Highlights of the revision of National accounts
Sources and Methods-National Accounts Statistics- Kenya