The biggest increases in sites measured come in Russia (244%), South Korea (234%), Australia (183%), the Netherlands (180%) and France (179%).
The expansion effort will also help add depth to reporting on specific site categories and help to smooth out fluctuation in monthly data patterns and improve trend analysis, the online ratings company said.
"As the Internet continues to grow globally, it has become increasingly necessary to provide even greater depth of reporting in specific industries and across international markets," said Linda Boland Abraham, comScore executive vice president, in a statement.
The enhanced reporting will initially be made available in markets outside the U.S., before being released domestically in the coming weeks.--Mark Walsh