Number of factories

1,538
1,533
1,527
1,522
1,517
1,512
1,506
1,501
1,496
1,490
1,485













































































































































































































































































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The X-axis in the diagram shows:  Days
The Y-axis in the diagram shows:  Number of factories
 X:    5  6  7  8  9 
 Y:    1,516   1,538  1,499  1,501  1,508 
 X:    10  11  12  13   14 
 Y:    1,505  1,515  1,514  1,490  1,485