Very interesting statistics were published on the World Internet Usage Statistics and Population. From this table it shows that only 15%! of the world uses the internet which is surprisingly low. When you consider Asia alone has over 50% of world’s population it starts to make more sense given their low adoption rate. This combined with Africa which has an expected low adoption rate of less than 3% really lowers the world average.

Taken from Read/Write Web -Worldwide Internet Penetration is just 15%
From a business perspective I can see a lot of business plans referencing to the strong growth in Asia and companies expanding their services and language versions to accommodate these countries. There appears to be an opportunity to focus on this market with a long term view to grab the huge population yet to embrace the internet the way we have in the west. Surely the likes of China and India will eventually have internet adoption closer to 50% of the population. Japan for example has a very good internet adoption to match the US and some countries in Europe.
I didn’t spot any exact figures for Ireland but maybe someone can point me to another resource so we can compare and contrast with the rest of the world. From a personal point of view I wonder how closely those percentage adoption rates correlate with business internet adoption rates in those countries.