Just published the research "The 2015 State of Scrum Report".

In February 2015, Scrum Alliance® surveyed almost 5,000 people about their use of Scrum. The survey respondents make up a diverse group, representing 108 countries and more than 14 industries. They reflect a range of functional areas, including IT software development, product development, operations, human resources, executives, and sales and marketing. Most have a technology slant, with 44% working in software development and 33% in IT. And they’re an Agile-savvy group, involved in an average of 4 Agile projects in the last 12 months.
From the survey results, we see that Scrum is becoming an increasingly popular and in-demand framework. In fact, nearly half the respondents report that Scrum is being used 50% or more of the time in their organizations, and 29% of respondents report it’s used much more frequently than that. The survey uncovered some interesting key findings… findings that not only reflect where Scrum is today but what we can anticipate it will look like tomorrow. These include who is practicing Scrum, how they are practicing it, success levels associated with Scrum, and plans for continuing to use it.