Rosetta Stone also expects the Livemocha acquisition to help accelerate geographic expansion, as Livemocha's community is quite global and has a high concentration of users in China, Russia and South America.
The Philippines has a sophisticated cellular phone industry and a high concentration of users.
They are among the cities with high concentrations of iPhone users who complain that the service does not work even in homes and offices with direct line of sight to traditional cellphone towers.
Facebook is especially an appealing source given they make up the highest concentration of users, around 45 million.
You can see a higher concentration of users in North America and Europe, but that's to be expected.
According to the survey, the highest concentration of users is found in only a handful of countries, including Spain, Ireland, France, Denmark, and the UK, where 9.5percentt of adults claim they have used the illicit stimulant.
That's why you see these problems at conferences or in large cities with high concentration of iPhone users".
The initial introduction of the technology does not include San Francisco and New York, where a high concentration of iPhone users has taxed the network and provoked complaints.
Nevada currently has one of the highest concentrations of marijuana users in the nation, so it's likely that a measure to legalize marijuana could bring out extra voters there as well.
Indonesia, where 76.2% of males aged 15 or older smoke, Vietnam (47.7%), and the Philippines (43%) have some of the world's highest concentrations of tobacco users, it said.
High concentrations of mercury can also kill them.
