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 Number Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 228 147 375 9.5 6.1 15.6 5 0 5 7.0 0.0 7.0 15 19 34 9.0 11.4 20.4 14 5 17 4.3 1.5 5.8 1-Astronomical 436 311 747 18.1 12.9 31.0 29 6 35 40.8 8.4 49.2 34 34 68 20.3 20.3 40.6 64 128 192 19.7 39.4 59.1 2-Aircraft 227 197 424 9.4 8.2 17.6 0 2 2 0.0 2.8 2.8 9 5 14 5.4 3.0 8.4 28 12 40 8.6 3.7 12.3 3-Light Phenom. 19 11 30 0.8 0.5 1.3 2 0 2 2.8 0.0 2.8 1 1 2 0.6 0.6 1.2 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 0.6 0.6 1.2 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 9 12 21 0.4 0.5 0.9 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 6-Insuffic. Info. 215 0 215 8.9 0.0 8.9 5 0 5 7.0 0.0 7.0 16 0 16 9.6 0.0 9.6 22 0 22 6.8 0.0 6.8 7-Psychological 34 0 34 1.4 0.0 1.4 2 0 2 2.8 0.0 2.8 0 0 0 0.0 0.0 0.0 1 0 1 0.3 0.0 0.3 8-Unknown 463 0 463 19.2 0.0 19.2 12 0 12 16.9 0.0 16.9 23 0 23 13.8 0.0 138 40 0 40 12.3 0.0 12.3 9-Other 99 0 99 4.1 0.0 4.1 8 0 8 11.3 0.0 11.3 8 0 8 4.8 0.0 4.8 10 0 10 3.1 0.0 3.1 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 30 7 37 11.8 2.8 14.6 10 4 14 7.4 2.9 10.3 154 112 266 10.6 7.7 183 1-Astronomical 46 25 71 18.1 9.8 27.9 23 14 37 16.9 10.3 27.2 240 104 344 16.5 7.1 23.6 2-Aircraft 22 13 35 8.6 5.1 13.7 15 7 22 11.0 5.1 16.1 153 158 311 10.5 10.8 21.3 3-Light Phenom. 0 0 0 0.0 0.0 0.0 2 1 3 1.5 0.7 2.2 14 9 23 1.0 0.6 1.6 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 9 12 21 0.6 0.8 14 6-Insuffic. Info. 44 0 44 17.3 0.0 17.3 10 0 10 7.4 0.0 7.4 118 0 118 8.1 0.0 8.1 7-Psychological 4 0 4 1.6 0.0 1.6 2 0 2 1.5 0.0 1.5 25 0 25 1.7 0.0 1.7 8-Unknown 53 0 53 20.8 0.0 20.8 43 0 43 31.6 0.0 31.6 292 0 292 20.0 0.0 200 9-Other 10 0 10 3.9 0.0 3.9 5 0 5 3.7 0.0 3.7 58 0 58 4.0 0.0 40 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 22 21 43 8.0 7.6 15.6 0 0 0 0.0 0.0 0.0 1 1 2 6.7 6.7 13.4 2 0 2 10.0 0.0 10.0 1-Astronomical 12 13 25 4.4 4.7 9.1 2 2 4 22.2 22.2 444 2 1 3 13.3 6.7 20.0 6 4 10 30.0 20.0 50.0 2-Aircraft 53 43 96 19.3 15.6 349 1 0 1 11.1 0.0 11.1 3 0 3 20.0 0.0 20.0 2 4 6 10.0 20.0 30.0 3-Light Phenom. 4 2 6 1.4 0.7 2.1 0 0 0 0.0 0.0 0.0 1 0 1 6.7 0.0 6.7 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. 2 1 3 0.7 0.4 1.1 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. 19 0 19 6.9 0.0 6.9 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 7-Psychological 4 0 4 1.4 0.0 1.4 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 64 0 64 23.3 0.0 23.3 2 0 2 22.2 0.0 22.2 2 0 2 13.3 0.0 13.3 2 0 2 10.0 0.0 10.0 9-Other 15 0 15 5.4 0.0 5.4 2 0 2 22.2 0.0 22.2 4 0 4 26.7 0.0 26.7 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 5.3 0.0 5.3 0 0 0 0.0 0.0 0.0 18 20 38 8.7 9.7 18.4 1-Astronomical 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 2 6 8 1.0 2.9 3.9 2-Aircraft 6 1 7 31.6 5.3 36.9 0 0 0 0.0 0.0 0.0 41 38 79 19.8 18.4 38.2 3-Light Phenom. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 3 2 5 1.4 1.0 2.4 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 2 1 3 1.0 0.5 1.5 6-Insuffic. Info. 1 0 1 5.3 0.0 5.3 0 0 0 0.0 0.0 0.0 18 0 18 8.7 0.0 8.7 7-Psychological 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 4 0 4 1.9 0.0 1.9 8-Unknown 9 0 9 47.4 0.0 47.4 4 0 4 80.0 0.0 800 45 0 45 21.7 0.0 21.7 9-Other 1 0 1 5.3 0.0 5.3 1 0 1 20.0 0.0 20.0 7 0 7 3.4 0.0 3.4 </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.