Everyone knows that parking in

Everyone knows that parking in San Francisco is a pain, but I never knew just how bad it was until I came across some data in this article:

"Competing for the 308,000 on-street parking spaces are the 453,905 vehicles registered by the city's 801,400 residents, the 200,000 other people who stream into San Francisco every day to work or shop, and an unknown number of tourists and sightseers who drive in for the day."