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 10:28:26 10:35:37 10:43:28 10:44:37 Oct 1 2 Oct 1, 2016 2 instances 15:16:05 15:22:03 4 3 Oct 4, 2016 3 instances 07:22:48 07:34:56 08:31:10 Nov Dec 30