Formula One has been ratcheting up the number of races on its calendar for decades. It ran with ten or fewer races through the 1950s and into the late 60s, then started climbing into the teens until it plateaued around 16 races throughout the 80s and 90s. But since then it's been climbing: 17 races after the turn of the millennium, 18 in 2004 and 19 in 2005. The year before last it reached a record 20 races, and now it's back up there again.
Formula One racing in North America has come a long way in the last few years. Having been absent from the calendar from 1992 through 1998 and again from 2008 through 2011 (when American racing fans could only catch the Canadian Grand Prix up in Montreal), the United States Grand Prix is now a regular fixture on the calendar at the Circuit of the Americas in Austin, TX. There's even a second race in the works for the New York/New Jersey area, if that ever actually gets off the ground. And next y