11 instances from 2 years 2017 - 1 instance Jan 9 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2016 - 10 instances Jan Feb Mar Apr May Jun Jul Aug Sep 21 4 Sep 21, 2016 4 instances 20:24:31 20:54:13 20:57:15 21:12:53 Oct 2 3 5 3 Oct 5, 2016 3 instances 15:45:57 16:02:25 18:21:38 Nov Dec 31