| 2025-03-31 | Step on a ladder |
| 2023-06-07 | Ladder part |
| 2023-02-12 | Hierarchy level |
| 2022-04-24 | Like church bells |
| 2021-07-19 | Step on a ladder |
| 2021-06-13 | Like bells in carillons |
| 2021-01-31 | Step on a ladder |
| 2020-09-11 | Like bells |
| 2020-07-05 | Like the Liberty Bell in 1846, for the last time |
| 2018-11-05 | Step on a ladder |
| 2017-06-22 | What'll give you a leg up? |
| 2017-02-19 | Step up or down |
| 2016-11-10 | Small step up? |
| 2016-03-08 | Step on a ladder |
| 2015-02-24 | Step on a ladder |
| 2013-04-16 | Provider of a leg up? |
| 2011-05-16 | Ladder step |
| 2008-07-17 | Like a bell |
| 2007-06-04 | Ladder step |
| 2005-08-20 | One small step for a man? |
| 2004-04-25 | It helps you get a leg up |
| 2002-03-24 | Hierarchy level |
| 2001-10-08 | Step on a ladder |
| 1999-07-07 | Hierarchy level |
| 1998-01-02 | Crosspiece |
| 1997-11-10 | Ladder step |
| 1996-05-19 | Pealed |
| 1996-04-09 | Crosspiece |
| 1995-07-21 | Step |
| 1995-04-19 | Ladder unit |