[CQ-Contest] ARRL SS SSB

[Joe]

Kind of looking at the log from last november antuicipating the results 
any day now. But something I noticed was interesting on the CK Numbers 
we worked. And how many,, Check this out.

Sweepstakes Checks
Check  QSOs    Pct
----------------------
   00     9     1.6
   01     2     0.4
   02     6     1.1
   03     4     0.7
   04     3     0.5
   05     2     0.4
   06     2     0.4
   07     3     0.5
   08     4     0.7
   09     3     0.5
   10     2     0.4
   11     3     0.5
   12     4     0.7
   13     7     1.2
   14     5     0.9
   15     8     1.4
   16     9     1.6
   17     6     1.1
   18     0     0.0
   19     0     0.0
   20     0     0.0
   21     0     0.0
   22     0     0.0
   23     0     0.0
   24     1     0.2
   25     0     0.0
   26     0     0.0
   27     0     0.0
   28     0     0.0
   29     0     0.0
   30     1     0.2
   31     2     0.4
   32     1     0.2
   33     1     0.2
   34     0     0.0
   35     0     0.0
   36     0     0.0
   37     0     0.0
   38     0     0.0
   39     0     0.0
   40     1     0.2
   41     0     0.0
   42     0     0.0
   43     0     0.0
   44     0     0.0
   45     0     0.0
   46     0     0.0
   47     2     0.4
   48     3     0.5
   49     1     0.2
   50     0     0.0
   51     1     0.2
   52     6     1.1
   53     4     0.7
   54     7     1.2
   55     7     1.2
   56     6     1.1
   57     9     1.6
   58     8     1.4
   59    20     3.5
   60    16     2.8
   61    19     3.4
   62    20     3.5
   63    19     3.4
   64    12     2.1
   65    13     2.3
   66    12     2.1
   67    16     2.8
   68    12     2.1
   69    17     3.0
   70    13     2.3
   71    11     1.9
   72    10     1.8
   73    13     2.3
   74     9     1.6
   75    11     1.9
   76    24     4.2
   77    16     2.8
   78     9     1.6
   79    11     1.9
   80     4     0.7
   81     5     0.9
   82     3     0.5
   83     8     1.4
   84     4     0.7
   85     4     0.7
   86     6     1.1
   87     7     1.2
   88     2     0.4
   89    11     1.9
   90     7     1.2
   91    15     2.7
   92     7     1.2
   93     6     1.1
   94     4     0.7
   95     5     0.9
   96     8     1.4
   97     4     0.7
   98     5     0.9
   99     5     0.9

Everything is in the single digits till 1958/59 What happened then? WOW!
and then in 1980 it fell apart again.

what changed on those dates?

Joe WB9SBD
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