| SH Location | Percent Change | NH Location | Percent Change |
| N Pole (−90˚S) | 15% | Alert, Canada (82˚N) | 15% |
| Cape Grim (−41˚S) | 15% | Azores, Port (38.7˚N) | 15.5% |
| Samoa (−14˚S) | 15.8% | Mauna Loa (19.5˚N) | 15.5% |
| Average SH | 15.3% | Average NH | 15.3% |