28 instances from 6 years 2020 - 3 instances Jan 19 Feb Mar Apr May Jun 27 Jul Aug Sep Oct Nov 12 Dec 2019 - 3 instances Jan Feb 27 Mar Apr May Jun Jul 20 Aug Sep Oct 26 Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 22 2 Jun 22, 2018 2 instances 08:03:20 22:03:50 27 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan 7 Feb Mar Apr May Jun 23 Jul Aug Sep Oct 4 Nov Dec 27 2016 - 14 instances Jan Feb 18 Mar Apr May Jun 21 3 Jun 21, 2016 3 instances 03:55:31 03:59:32 06:21:42 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 13:04:55 13:15:41 13:21:57 13:29:37 Oct 1 2 Oct 1, 2016 2 instances 20:01:53 20:13:39 4 3 Oct 4, 2016 3 instances 12:21:33 12:32:20 13:30:00 Nov Dec 30 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 17