The telecoms sector increased in value from Dh25.6 billion ($3.3 billion) in 2006 to Dh33.3 billion ($4.2 billion) in 2007. With a workforce of some 41,000 employees, the sector contributes 7% to annual GDP and is one of the countrys leading recipients of foreign direct investment (FDI). Under the development plan, the sector should employ 125,000 people by 2012 and contribute 10% of GDP. With the penetration rates of 69.4% from mobile phones and 8.95% for fixed lines, the Moroccan telecoms industry is set to continue to grow. The call centre industry partially as a result of offshore initiatives, such as Casanearshore and Rabat Technoplis will continue to expand. However, the worldwide call centre industry is highly competitive and education is the key to success if Morocco truly intends to become a leading international player in this industry.

Answer this question based on the article: How many billion dollars did the telecom industry sector increase from 2006 to 2007?
0.9