Stations	Counts	Average	Min	25%	75%	Max	Limit value
Urban	770	-0.475	-3.09	-0.725	-0.174	1.257	0
Traffic	427	-0.687	-4.422	-1.085	-0.221	3.744	0
Rural	256	-0.216	-2.2	-0.377	-0.036	0.891	0
Other	228	-0.494	-2.385	-0.808	-0.138	1.831	0