14 instances from 2 years 2017 - 2 instances Jan 8 Feb Mar Apr May Jun 23 Jul Aug Sep Oct Nov Dec 2016 - 12 instances Jan Feb Mar Apr May Jun 21 22 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 16:03:34 16:52:36 21:34:27 21:51:58 Oct 1 2 Oct 1, 2016 2 instances 22:44:47 23:57:34 4 3 Oct 4, 2016 3 instances 17:24:03 17:51:40 20:30:01 Nov Dec 30