These impressive numbers are driven by adult speakers around the world who use English to communicate in the workplace. It is a commonly held misconception that these speakers need English to communicate with native speakers. While ESL is required for those living and working in English speaking cultures such as the UK and USA, it is equally true that English is used as the lingua franca between nations where English is not the primary language. In a globalized world, the number of English learners around the world is only expected to further grow.
For more detailed information on the trends behind English learning around the world, take a look at the British Council's "English Next".