| Reports | Count |
|---|---|
| Unspecified | 6294 |
| Changing | 3480 |
| Chevron | 1595 |
| Cigar | 3445 |
| Circle | 14709 |
| Cone | 554 |
| Cross | 450 |
| Cylinder | 2207 |
| Delta | 24 |
| Diamond | 2001 |
| Disk | 8238 |
| Egg | 1202 |
| Fireball | 9633 |
| Flash | 2383 |
| Formation | 4623 |
| Light | 28114 |
| Other | 9557 |
| Oval | 6018 |
| Rectangle | 2400 |
| Sphere | 9040 |
| Star | 38 |
| Teardrop | 1190 |
| Triangle | 12468 |
| Unknown | 9431 |