People in City

Every city has it's population. The people inside a city, represent how many different people own plots inside that city. Requirement:
 * Name: People in City
 * Tax Modifier: 10 (1,000 per object)
 * Size: N/A
 * Protected by the server: No
 * Limit Per City: N/A

Each unique player who owns a plot inside the city, contributes one towards this value.