| Reports | Count |
|---|---|
| Unspecified | 6377 |
| Changing | 3802 |
| Chevron | 1700 |
| Cigar | 3652 |
| Circle | 13958 |
| Cone | 597 |
| Cross | 488 |
| Cube | 8 |
| Cylinder | 2403 |
| Delta | 1 |
| Diamond | 2077 |
| Disk | 8526 |
| Egg | 1250 |
| Fireball | 9796 |
| Flash | 2393 |
| Formation | 4757 |
| Light | 27034 |
| Orb | 5418 |
| Other | 9901 |
| Oval | 6237 |
| Rectangle | 2526 |
| Sphere | 7512 |
| Star | 126 |
| Teardrop | 1219 |
| Triangle | 12879 |
| Unknown | 9814 |