Number of factories

2,589
2,438
2,288
2,137
1,987
1,836
1,685
1,535
1,384
1,234
1,083













































































































































































































































































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The X-axis in the diagram shows:  Days
The Y-axis in the diagram shows:  Number of factories
 X:    17  18  19  20  21 
 Y:    1,083   1,234  1,386  1,534  1,663 
 X:    22  23  24  25   26 
 Y:    1,780  2,036  2,208  2,420  2,589