Only 7% of people get eight hours of sleep a night. But the effects of this might be calamitous: Getting less sleep is associated with a 200% rise in cancer, a 100% rise in heart disease, and a 20% rise in the likelihood you’ll be dead in 20 years. That said, what the infographic doesn’t tell is that sleeping too much can be almost as a dangerous as not sleeping enough. If you sleep over nine hours a day, you’re more likely to be fat, diabetic, depressed, and have heart disease. So get eight hours, but no more.