| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| how many serial killers have not been caught | 1.5 | 0.1 | 1219 | 29 |
| how many serial killers have there been | 1.49 | 0.2 | 846 | 97 |
| what serial killers have not been caught | 1.16 | 0.8 | 4003 | 76 |
| how many serial killers are there today | 0.14 | 1 | 8418 | 85 |
| how many current serial killers are there | 1.26 | 0.7 | 4513 | 64 |
| how many uncaught serial killers are there | 0.6 | 0.8 | 3150 | 84 |
| how many serial killers in america today | 1.62 | 0.7 | 1383 | 89 |
| how many people are serial killers | 1.74 | 0.9 | 6368 | 21 |
| how many serial killers in america | 1.46 | 0.5 | 8684 | 6 |
| how many serial killers in history | 1.19 | 0.5 | 4512 | 31 |
| how many serial killers in the world | 0.58 | 1 | 3735 | 63 |
| what percentage of serial killers are caught | 0.14 | 0.7 | 7210 | 14 |
| number of serial killers | 0.13 | 0.1 | 8316 | 59 |
| serial killers never caught list | 0.64 | 0.3 | 3009 | 48 |
| total number of serial killers | 1.37 | 0.6 | 9719 | 57 |
