20 instances from 3 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 01:35:17 01:35:40 01:36:05 Jul Aug Sep Oct Nov Dec 2017 - 7 instances Jan 6 2 Jan 6, 2017 2 instances 16:19:13 16:25:46 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 03:59:17 03:59:23 Jul Aug Sep Oct 2 Nov 2 Dec 25 2016 - 10 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 18:35:27 18:41:00 18:41:49 19:01:42 Oct 1 2 Oct 1, 2016 2 instances 03:12:44 03:19:06 3 3 Oct 3, 2016 3 instances 18:56:10 19:02:36 19:05:36 Nov Dec 29