In NUMBER@1 , the office of the Postmaster General -LRB- ORGANIZATION@1 -RRB- introduced the NUMBER@2 number in major population centres and near the end of the NUMBER@3 extended its coverage to nationwide .

In NUMBER@1 , the Postmaster General -LRB- ORGANIZATION@1 -RRB- introduced the NUMBER@2 number in most of the major MISC@1 cities and by the end of the NUMBER@3 it had become nation-wide .
