12 instances from 2 years 2017 - 2 instances Jan 7 Feb 3 Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2016 - 10 instances Jan Feb Mar Apr May Jun Jul Aug Sep 20 4 Sep 20, 2016 4 instances 10:28:17 10:35:27 10:43:19 10:44:28 Oct 1 2 Oct 1, 2016 2 instances 15:08:30 15:14:24 4 3 Oct 4, 2016 3 instances 07:15:13 07:27:21 08:23:35 Nov Dec 30