19 instances from 3 years 2018 - 1 instance Jan 3 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2017 - 6 instances Jan 7 Feb Mar Apr May Jun 21 22 23 2 Jun 23, 2017 2 instances 12:23:02 21:48:47 Jul Aug Sep Oct 6 Nov Dec 2016 - 12 instances Jan Feb Mar Apr May Jun 20 4 Jun 20, 2016 4 instances 13:15:50 19:29:21 21:43:55 22:42:39 Jul Aug Sep 19 4 Sep 19, 2016 4 instances 19:08:45 19:14:33 19:31:32 19:37:06 Oct 1 3 2 Oct 3, 2016 2 instances 18:08:16 19:03:53 Nov Dec 29