Chapter 7:  Machine utilization and pretax profit over the last
25 months.

Col 1: Month
Col 2: Utilization (percentage)
Col 3: Pretax-Profit (in $)

 1       62   35456
 2       68   90069
 3       76  130324
 4       68   20146
 5       65   23795
 6       73   34543
 7       81   81972
 8       74  155130
 9       81  121336
10       83  117927
11       85  191035 
12       53    8870
13       56   24834
14       48   17084
15       43   -7492
16       42  -72002
17       40   -5351
18       41  -52004
19       40  -96571
20       47  -57306
21       47   22722
22       35  -45865
23       33   10926
24       56  -85845
25       50   13890