13 instances from 2 years 2017 - 1 instance Jan 8 Feb Mar Apr May Jun 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 16:33:36 17:21:47 22:04:26 22:21:59 Oct 1 2 4 3 Oct 4, 2016 3 instances 17:52:12 18:19:58 21:16:00 Nov Dec 30