20 instances from 3 years 2018 - 1 instance Jan 5 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan Feb Mar Apr May Jun Jul Aug Sep 26 2 Sep 26, 2017 2 instances 16:56:31 16:56:34 Oct 2 2 Oct 2, 2017 2 instances 10:40:34 10:40:37 Nov Dec 2016 - 15 instances Jan Feb Mar 24 Apr May Jun 20 2 Jun 20, 2016 2 instances 11:07:54 14:10:53 21 Jul Aug Sep 19 4 Sep 19, 2016 4 instances 18:01:10 19:07:31 19:12:43 19:12:47 Oct 1 2 Oct 1, 2016 2 instances 02:08:14 02:12:27 3 5 Oct 3, 2016 5 instances 13:45:27 13:45:30 17:48:19 17:53:18 17:53:41 Nov Dec