I want to know the answer to the following question:
What was the percentage of labels youtube had signed contracts with prior to the planned launch date?
All the background I'm provided with is that "In a statement to the Financial Times in June 2014, Robert Kyncl confirmed that YouTube would block the content of labels who do not negotiate deals to be included in the paid service "to ensure that all content on the platform is governed by its new contractual terms."". Is that enough to answer the question?