24957
The population of Aarau grew continuously from 1800 until about 1960 , when the city reached a peak population of 17,045 , more than five times its population in 1800 .
 Aarau
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Aarau