For my annual April Fool’s Day post, we revisit some of the past year’s most useless and inane numbers presentations. This year we celebrate an infographic about marijuana use in the U.S. in the recent past. This graph is this year’s winner because it is not only shockingly incompetent, but appeared on the website of a news outlet – CBS News – that really should know better.

Hans Rosling, age 68, died earlier this month. He contributed more than almost anyone to helping people truly understand the world as it is. In an era when we have gone overboard for the glitziest data visualization techniques – frequently at the expense of comprehensibility or of any meaning whatsoever – Rosling’s presentations are informative but still imaginative and entertaining. His work demonstrates the potential that data visualization can have, but all too often doesn’t – we’ll see one of his best examples here.