The U.S. Department of Commerce publishes a series of census documents referred to as Current Industrial Reports. Included in these documents are the manufacturers' shipments, inventories, and orders over a 5-year period. Displayed here is a portion of these data representing the shipments of chemicals and allied products from January of year 1 through December of year 5. Use time-series decomposition methods to develop the seasonal indexes for these data.
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Chemicals
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Chemicals
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and Allied
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and Allied
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Products
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Products
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Time Period
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($ billion)
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Time Period
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($ billion)
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January (year 1)
|
23.701
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January (year 2)
|
23.347
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February
|
24.189
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February
|
24.122
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March
|
24.200
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March
|
25.282
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April
|
24.971
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April
|
25.426
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|
|
|
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May
|
24.560
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May
|
25.185
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June
|
24.992
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June
|
26.486
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July
|
22.566
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July
|
24.088
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August
|
24.037
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August
|
24.672
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September
|
25.047
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September
|
26.072
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October
|
24.115
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October
|
24.328
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November
|
23.034
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November
|
23.826
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December
|
22.590
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December
|
24.373
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January (year 3)
|
24.207
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January (year 4)
|
25.316
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February
|
25.772
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February
|
26.435
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March
|
27.591
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March
|
29.346
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April
|
26.958
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April
|
28.983
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May
|
25.920
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May
|
28.424
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June
|
28.460
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June
|
30.149
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July
|
24.821
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July
|
26.746
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August
|
25.560
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August
|
28.966
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September
|
27.218
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September
|
30.783
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October
|
25.650
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October
|
28.594
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|
November
|
25.589
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November
|
28.762
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|
December
|
25.370
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December
|
29.018
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Chemicals
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|
and Allied
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|
|
Products
|
|
Time Period
|
($ billion)
|
|
January (year 5)
|
28.931
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February
|
30.456
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March
|
32.372
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April
|
30.905
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May
|
30.743
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June
|
32.794
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July
|
29.342
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August
|
30.765
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September
|
31.637
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October
|
30.206
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November
|
30.842
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| December |
31.090
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