Project Blue Book Special Report No. 14 (Analysis of Reports of Unidentified Aerial Objects)
CIA-UAP-015 · page 117 of 312
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TABLE A3 EVALUATION OF OBJECT SIGHTINGS BY YEARS Evaluation | ALL YEARS | 1947 | 1948 | 1949 Number | Per Cent | Number | Per Cent | 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 | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total 0-Balloon | 207 | 132 | 339 | 9.4 | 6.0 | 15.4 | 7 | 0 | 7 | 8.9 | 0.0 | 8.9 | 12 | 10 | 22 | 8.4 | 7.0 | 15.4 | 11 | 2 | 13 | 5.9 | 1.1 | 7.0 | 29 | 55 | 84 | 15.6 | 29.5 | 45.1 | 25 | 14 | 39 | 14.8 | 8.3 | 23.1 1-Astronomical | 274 | 205 | 479 | 12.5 | 9.3 | 21.8 | 8 | 8 | 16 | 10.1 | 10.1 | 20.2 | 25 | 23 | 48 | 17.5 | 16.1 | 33.6 | 18 | 12 | 30 | 9.7 | 6.4 | 16.1 | 171 | 91 | 262 | 11.4 | 6.1 | 17.5 | 122 | 9 | 31 | 13.0 | 5.3 | 18.3 2-Aircraft | 265 | 209 | 474 | 12.0 | 9.5 | 21.5 | 2 | 2 | 4 | 2.5 | 2.5 | 5.0 | 15 | 4 | 19 | 10.5 | 2.8 | 13.3 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 193 | 176 | 369 | 12.9 | 11.7 | 24.6 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 3-Light Phenom. | 30 | 18 | 48 | 1.4 | 0.8 | 2.2 | 2 | 0 | 2 | 2.5 | 0.0 | 2.5 | 2 | 3 | 5 | 1.4 | 2.1 | 3.5 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 25 | 14 | 39 | 1.7 | 0.9 | 2.6 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 4-Birds | 12 | 10 | 22 | 0.5 | 0.5 | 1.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 2 | 3 | 5 | 1.4 | 2.1 | 3.5 | 2 | 1 | 3 | 1.1 | 0.5 | 1.6 | 148 | 7 | 151 | 9.9 | 0.0 | 9.9 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 5-Clouds, Dust, etc. | 3 | 7 | 10 | 0.1 | 0.3 | 0.4 | 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 | 148 | 0 | 148 | 9.9 | 0.0 | 9.9 | 2 | 0 | 2 | 1.2 | 0.0 | 1.2 6-Insuffic. Info. | 240 | 0 | 240 | 10.9 | 0.0 | 10.9 | 12 | 0 | 12 | 15.2 | 0.0 | 15.2 | 17 | 0 | 17 | 11.9 | 0.0 | 11.9 | 25 | 0 | 25 | 13.4 | 0.0 | 13.4 | 303 | 6 | 309 | 10.2 | 0.0 | 10.2 | 39 | 0 | 39 | 23.0 | 0.0 | 23.0 7-Psychological | 35 | 9 | 44 | 1.6 | 0.4 | 2.0 | 3 | 2 | 5 | 3.8 | 2.5 | 6.3 | 1 | 0 | 1 | 0.7 | 0.0 | 0.7 | 3 | 0 | 3 | 1.6 | 0.0 | 1.6 | 25 | 6 | 31 | 1.7 | 0.4 | 2.1 | 6 | 3 | 9 | 3.5 | 1.8 | 5.3 8-Unknown | 434 | 0 | 434 | 19.7 | 0.0 | 19.7 | 22 | 0 | 22 | 27.8 | 0.0 | 27.8 | 15 | 0 | 15 | 10.5 | 0.0 | 10.5 | 22 | 0 | 22 | 11.8 | 0.0 | 11.8 | 303 | 0 | 303 | 10.2 | 0.0 | 10.2 | 39 | 0 | 39 | 23.0 | 0.0 | 23.0 9-Other | 85 | 24 | 109 | 3.9 | 1.1 | 5.0 | 11 | 0 | 11 | 13.9 | 0.0 | 13.9 | 4 | 7 | 11 | 2.6 | 4.9 | 7.7 | 6 | 0 | 6 | 3.2 | 0.0 | 3.2 | 51 | 14 | 65 | 3.9 | 0.9 | 4.3 | 6 | 3 | 9 | 3.5 | 1.8 | 5.3 Total | 1585 | 614 | 2199 | 72.1 | 27.9 | 100. | 67 | 12 | 79 | 84.8 | 15.2 | 100. | 93 | 50 | 143 | 65.0 | 35.0 | 100. | 116 | 70 | 186 | 62.4 | 37.6 | 100. | | | | | | | | | | | Evaluation | 1950 | 1951 | 1952 | Number | Per Cent | Number | Per Cent | 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 | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total 0-Balloon | 21 | 4 | 25 | 12.4 | 2.4 | 14.8 | 8 | 3 | 11 | 6.6 | 2.5 | 9.1 | 148 | 113 | 261 | 9.9 | 7.5 | 17.4 | | | | | | | | | | | | | | | | 1-Astronomical | 25 | 14 | 39 | 14.8 | 8.3 | 23.1 | 16 | 14 | 30 | 13.2 | 11.6 | 24.8 | 171 | 91 | 262 | 11.4 | 6.1 | 17.5 | | | | | | | | | | | | | | | | 2-Aircraft | 22 | 9 | 31 | 13.0 | 5.3 | 18.3 | 15 | 6 | 21 | 12.4 | 5.0 | 17.4 | 193 | 176 | 369 | 12.9 | 11.7 | 24.6 | | | | | | | | | | | | | | | | 3-Light Phenom. | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 1 | 1 | 2 | 0.8 | 0.8 | 1.6 | 25 | 14 | 39 | 1.7 | 0.9 | 2.6 | | | | | | | | | | | | | | | | 4-Birds | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 1 | 1 | 0.0 | 0.8 | 0.8 | 8 | 5 | 13 | 0.5 | 0.3 | 0.8 | | | | | | | | | | | | | | | | 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 | 0.5 | 0.7 | | | | | | | | | | | | | | | | 6-Insuffic. Info. | 24 | 0 | 24 | 14.2 | 0.0 | 14.2 | 14 | 0 | 14 | 11.6 | 0.0 | 11.6 | 148 | 0 | 148 | 9.9 | 0.0 | 9.9 | | | | | | | | | | | | | | | | 7-Psychological | 2 | 0 | 2 | 1.2 | 0.0 | 1.2 | 1 | 1 | 2 | 0.8 | 0.8 | 1.6 | 25 | 6 | 31 | 1.7 | 0.4 | 2.1 | | | | | | | | | | | | | | | | 8-Unknown | 39 | 0 | 39 | 23.0 | 0.0 | 23.0 | 33 | 0 | 33 | 27.3 | 0.0 | 27.3 | 303 | 0 | 303 | 20.2 | 0.0 | 20.2 | | | | | | | | | | | | | | | | 9-Other | 6 | 3 | 9 | 3.5 | 1.8 | 5.3 | 7 | 0 | 7 | 5.8 | 0.0 | 5.8 | 51 | 14 | 65 | 3.9 | 0.9 | 4.3 | | | | | | | | | | | | | | | | Total | 139 | 30 | 169 | 82.3 | 17.7 | 100. | 95 | 26 | 121 | 78.5 | 21.5 | 100. | 1075 | 426 | 1501 | 71.6 | 28.4 | 100. | | | | | | | | | | | | | | | | 108