You can look at this data in two contexts.
First, you can think of what it means on the employee level and glean some pretty useful plans. You can 'do the math' and realize you might be needing to replace up to 87% of your workforce. You can hire another recruiter - or ten. You can change your comp and incentive plans to try to keep your mission-critical people. You can even start cross training, internship, mentoring, engagement, and similar programs.
Or, for something completely different, you can think about your workforce as a human infrastructure. How could it have become so fragile? How can it be restored? What have we been missing? How can we avoid repeating the same mistakes?