18 instances from 4 years 2020 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 14 Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct 26 Nov Dec 2017 - 3 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 10:24:07 11:21:55 Jul Aug Sep Oct Nov Dec 2016 - 12 instances Jan Feb Mar Apr May Jun 20 3 Jun 20, 2016 3 instances 14:06:22 17:41:18 22:39:20 21 Jul Aug Sep 19 2 Sep 19, 2016 2 instances 15:46:59 16:30:19 30 2 Sep 30, 2016 2 instances 21:55:19 23:04:20 Oct 3 3 Oct 3, 2016 3 instances 15:09:06 15:23:09 16:06:42 Nov Dec 29