Project Blue Book Special Report No. 14 (Analysis of Reports of Unidentified Aerial Objects)

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-~--------------------
Total Less Unknown
Unknown
Per Cent
Per Cent
80
70 60 50 40
30
20
10
0
0
IO
20 30 40 50 60 70 80
I
I
I
I
I
I
I
I
I
-
..
■
■
■
One
Two
c,,
(JI
Three
to
ten
Eleven
or
more
Not stated
FIGURE 19 COMPARISON OF KNOWN ANO UNKNOWN OBJECT SIGHTINGS BY NUMBER OF
OBJECTS PER SIGHTING, 1947-1952
A- 7497