17 instances from 4 years 2018 - 6 instances Jan Feb Mar Apr May 24 Jun 23 Jul 5 6 3 Jul 6, 2018 3 instances 12:05:33 13:46:23 14:04:48 Aug Sep Oct Nov Dec 2017 - 1 instance Jan 7 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2016 - 8 instances Jan Feb Mar Apr May Jun 20 3 Jun 20, 2016 3 instances 12:53:31 14:12:02 19:22:25 Jul Aug Sep Oct 1 2 Oct 1, 2016 2 instances 14:25:57 16:07:51 4 2 Oct 4, 2016 2 instances 06:23:38 06:32:30 Nov Dec 30 2015 - 2 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 16 2 Dec 16, 2015 2 instances 18:06:14 18:57:26