Significant Decline of Cities Index

In the Sanska era, cities in the world experienced a rapid decline in population, as more and more people began to move to the rural parts of the world to escape easily transmitted diseases, which were rampant at the time. Also people began to find negative effects of a city, and also the natural disasters occurring at the time. The sharpest decline experienced was that of Beijing in the People's Republic of Northern China, where ten million residents escaped to the countryside areas.
==The Index==
City Name 	Country 	Decline Experienced 	Cause 	Ranking of Most Sig. Decline	Notes
Beijing 	PRN China 	9.4million to 10.5million 	Mers outbreak in neighbouring cities 	1 	
Shanghai 	Chinese Rep. 	9.5million to 10.3million 	Mers outbreak in neighbouring cities 	2 	
New York City	United States	9.4 million to 9.5 million	Azores megatsunami 	3 	
Seoul 	R. of Korea 	9.1 million to 9.4 million	Mers outbreak 	4 	
Los Angeles 	United States	9.0 to 9.3 million 	San Andreas fault earthquake and influenza.	 	
 	 	 	 	 	
 	 	 	 	 	
Pyongyang 	PR of. Korea 	7.2 million to 7.9 million	Mers outbreak 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
Category:Decline
Category:Cities
Category:Biology
Category:Humans