Mobile game revenue grew from $4 billion in 2006 to $10 billion in 2010 according to Juniper Research, driven by factors like the recession, cheap mobile phone prices, and widespread availability of phones. Juniper Research forecasts that the mobile game industry will continue strong growth over the next few years, with revenue increasing by 42% in 2010, 31% in 2011, and 26% in 2012, as the share of mobile subscribers playing games increases globally and new monetization models are adopted that leverage voice minutes and on-device advertising.