17 instances from 3 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 22 26 Jul Aug Sep Oct Nov Dec 2017 - 5 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 13:34:27 15:51:25 Jul Aug Sep Oct 2 Nov Dec 26 2016 - 9 instances Jan Feb Mar Apr May Jun 23 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 17:17:06 19:13:31 19:36:03 30 2 Sep 30, 2016 2 instances 23:48:19 23:52:34 Oct 3 2 Oct 3, 2016 2 instances 17:11:57 18:07:21 Nov Dec 29