Documents / FOIA release
This CIA-released copy of Project Blue Book Special Report No. 14 is dated 5 May 1955 and comes from the Air Technical Intelligence Center at Wright-Patterson Air Force Base. It is a statistical analysis of about 4,000 unidentified aerial object reports from 1947 through 1952, coded onto IBM punched cards with the help of a panel of scientists. The report concludes that such objects were highly unlikely to be technological developments beyond present-day scientific knowledge. It also found no valid evidence of physical matter.
“Gray”4 pages
Read from the scan by GLM-OCR; expect the odd misread word.
# Approved For Release 2005/07/20 : CIA-RDP81R00560R000100060001-5 Evaluation All Years 1947 1948 1949 Number Per Cent Number Per Cent Number Per Cent Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 190 123 313 9.9 6.4 16.3 5 0 5 8.8 0.0 8.8 12 10 22 9.7 8.1 17.8 10 3 13 5.4 1.6 7.0 1-Astronomical 353 227 580 18.4 11.8 30.2 17 6 23 29.8 10.5 40.3 27 23 50 21.8 18.5 40.3 28 76 104 15.2 41.3 56.5 2-Aircraft 190 140 350 9.9 8.3 18.2 0 2 2 0.0 3.5 3.5 9 4 13 7.3 3.2 10.5 15 6 21 8.1 3.3 11.4 3-Light Phenom. 19 10 29 1.0 0.5 1.5 2 0 2 3.5 0.0 3.5 1 0 1 0.8 0.0 0.8 0 0 0 0.0 0.0 0.0 4-Birds 1 1 2 0.1 0.1 0.2 0 0 0 0.0 0.0 0.0 1 1 2 0.8 0.8 1.6 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 3 7 10 0.2 0.4 0.6 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 182 0 182 9.5 0.0 9.5 5 0 5 8.8 0.0 8.8 14 0 14 11.3 0.0 11.3 21 0 21 11.4 0.0 11.4 7-Psychological 29 3 32 1.5 0.2 1.7 2 0 2 3.5 0.0 3.5 0 0 0 0.0 0.0 0.0 1 0 1 0.5 0.0 0.5 8-Unknown 238 0 338 17.6 0.0 17.6 11 0 11 19.3 0.0 19.3 15 0 15 12.1 0.0 12.1 19 0 19 10.3 0.0 10.3 9-Other 59 22 81 3.1 1.1 4.2 7 0 7 12.3 0.0 12.3 3 4 7 2.4 3.2 5.6 5 0 5 2.7 0.0 2.7 1950 1951 1952 Evaluation Number Per Cent Number Per Cent Number Per Cent Number Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 19 5 24 11.0 2.9 13.9 9 3 12 7.7 2.6 10.3 135 102 237 10.7 8.1 18.8 1-Astonomical 39 18 57 22.7 10.5 33.2 20 11 31 17.1 9.4 26.5 222 93 315 17.6 7.4 250 2-Aircraft 18 9 27 10.5 5.2 15.7 15 7 22 12.8 6.0 18.8 133 132 265 10.5 10.5 21.0 3-Light Phenom. 0 0 0 0.0 0.0 0.0 2 1 3 1.7 0.9 2.6 14 9 23 1.1 0.7 1.8 4-Birds 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 3 7 10 0.2 0.6 0.8 6-Insuffic. Info. 21 0 21 12.2 0.0 12.2 10 0 10 8.5 0.0 8.5 111 0 111 8.8 0.0 8.8 7-Psychological 2 0 2 1.2 0.0 1.2 1 1 2 0.9 0.9 1.8 23 2 25 1.8 0.2 2.0 8-Unknown 34 0 34 19.8 0.0 19.8 32 0 32 27.3 0.0 27.3 227 0 227 18.0 0.0 18.0 9-Other 3 4 7 1.7 2.3 4.0 5 0 5 4.3 0.0 4.3 36 19 50 2.9 1.1 4.0 ALL YEARS 1947 1948 1949 Evaluation Number Per Cent Number Per Cent Number Per Cent Number Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 19 17 36 8.7 7.8 14.5 0 0 0 0.0 0.0 0.0 1 0 1 10.0 0.0 10.0 1 0 1 7.1 0.0 7.1 1-Astronomical 7 12 19 3.2 5.5 8.7 1 2 3 14.3 28.6 42.9 1 0 1 10.0 0.0 10.0 3 4 7 21.4 28.6 50.0 2-Aircraft 42 38 80 19.2 17.4 36.6 1 0 1 14.3 0.0 14.3 3 0 3 30.0 0.0 30.0 2 2 4 14.3 14.3 28.6 3-Light Phenom. 4 2 6 1.8 0.9 2.7 0 0 0 0.0 0.0 0.0 1 0 1 10.0 0.0 10.0 0 0 0 0.0 0.0 0.0 4-Birds 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 2 0 0.0 0.0 0.0 6-Insuffic. Info. 19 0 19 8.7 0.0 8.7 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 7-Psychological 3 1 4 1.4 0.5 1.9 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 8-Unknown 41 0 41 18.8 0.0 18.8 1 0 1 14.3 0.0 14.3 0 0 0 0.0 0.0 0.0 2 0 2 14.3 0.0 14.3 9-Other 10 3 13 4.6 1.4 6.0 2 0 2 28.6 0.0 28.6 1 3 4 10.0 30.0 40.0 0 0 0 0.0 0.0 0.0 1950 1951 1952 Evaluation Number Per Cent Number Per Cent Number Per Cent Number Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 1 0 1 10.0 0.0 10.0 0 0 0 0.0 0.0 0.0 16 17 33 9.1 9.7 18.8 1-Astronomical 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 2 6 8 1.1 3.4 4.5 2-Aircraft 4 1 5 40.0 10.0 50.0 0 0 0 0.0 0.0 0.0 32 35 67 18.3 20.0 38.3 3-Light Phenom. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 3 2 5 1.7 1.1 2.8 4-Birds 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 1 0 1 10.0 0.0 10.0 0 0 0 0.0 0.0 0.0 18 0 18 10.3 0.0 10.3 7-Psychological 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 3 1 4 1.7 0.6 2.3 8-Unknown 2 0 2 20.0 0.0 20.0 1 0 1 50.0 0.0 50.0 85 0 35 20.0 0.0 20.0 9-Other 1 0 1 10.0 0.0 10.0 1 0 1 50.0 0.0 50.0 5 0 5 2.9 0.0 2.9 </td
FOIA release, from the cia-readingroom collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 312 pages are in the text index: search them above, or from the library's search.