| At the end of the universe: 236 (12.2%) |  |
| A few weeks ago: 154 (8.0%) | |
| Later this millennium: 148 (7.7%) | |
| The era of classical civilisation: 122 (6.3%) | |
| The 22nd century: 119 (6.2%) | |
| Several years from now: 113 (5.8%) | |
| The Renaissance: 106 (5.5%) | |
| The 20th century: 91 (4.7%) | |
| A few thousand years hence: 84 (4.3%) | |
| The medieval period: 80 (4.1%) | |
| Decades in the future: 72 (3.7%) | |
| The Age of Enlightenment: 70 (3.6%) | |
| Next month: 69 (3.6%) | |
| The era of antiquity: 64 (3.3%) | |
| The rise of civilisation: 49 (2.5%) | |
| When the sun expands and the Earth is a cinder: 48 (2.5%) | |
| The Industrial Revolution: 45 (2.3%) | |
| The dawn of humanity: 43 (2.2%) | |
| The Precambrian Era: 34 (1.8%) | |
| Millions of years in the future: 34 (1.8%) | |
| The Dark Ages: 33 (1.7%) | |
| Tens of thousands of years from now: 32 (1.7%) | |
| The Jurassic: 25 (1.3%) | |
| The Cretaceous: 18 (0.9%) | |
| Next year: 17 (0.9%) | |
| The Pliocene Ice Age. Pleistocene, whatever...: 15 (0.8%) | |
| The Triassic: 11 (0.6%) | |
