The CDC just released its 2014 National Diabetes Statistics Report (PDF), and the results are alarming: 29.1 million Americans have diabetes, and 8.1 million of those are undiagnosed. It really reinforces the need for biometric screenings at the workplace. For many people, it's the only screening they have all year -- and the cost of untreated diabetes can be staggering.
The CDC created two excellent infographics (on diabetes and pre-diabetes) that you should definitely check out. You can view full-size versions them here and here.