Vacancy counts by year

The graph shows the number of vacant locations each year.

Vacancy rates by location

The map shows, for each location, the percentage of years, out of all years for which the location has existed, for which it was vacant. (Locations come and go as units are combined and divided.) Click on a location to see its history. Some locations overlap, so when you click on an area of the map you may not get the history for the location you expect. Below the map is a list of all locations, with links to their histories.
0% 0–10% 10–20% 20–30% 30–40% 40–50% > 50%