Change history of clock microseconds

Rev	Date	Modified by	Minor edit	Spam	WikiText	Revert to
5	2019-03-28 23:35:07	AMG	no	no	5	5
4	2011-02-17 03:58:39	Ro	no	no	4	4
3	2010-10-23 11:15:52	dkf	no	no	3	3
2	2007-10-17 17:58:22	andy	no	no	2	2
1	2007-10-17 17:58:07	andy	no	no	1	1
0	2007-10-17 17:26:01	LV	no	no	0	0