Number of factories
558
537
516
495
474
453
432
411
390
369
348
9
10
11
12
13
14
15
16
17
18
The X-axis in the diagram shows:
Days
The Y-axis in the diagram shows:
Number of factories
X:
9
10
11
12
13
Y:
348
378
401
427
449
X:
14
15
16
17
18
Y:
477
499
511
535
558
