The bottom of the list is dominated by tiny nations in the Pacific Ocean and Caribbean Sea, and many countries in Africa. Although developing countries are at the bottom of the list, they are also seeing an increase in mobile phone usage. A recent study commissioned by Vodafone (PDF) indicates that mobile phone use in Africa is growing faster than anywhere else in the World, and that 97% of people surveyed in Tanzania said they could access a mobile phone, while just 28% could access a land line phone. Asian countries have the highest mobile phone penetration of developing nations, helped by their proximity to Japan and South Korea and the fact that many mobile factories are located there. The telecommunications companies prefer mobile technology because there is less infrastructure to install, so in many cases citizens can afford mobiles when they can't afford (or get) land lines. Vodafone has also indicated it intends to drop mobile phone call rates to compete with landline businesses in a number of countries.