20 instances from 4 years 2020 - 3 instances Jan 18 Feb Mar Apr May Jun 30 Jul Aug Sep Oct Nov 14 Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 22 2 Jun 22, 2018 2 instances 00:38:37 14:24:01 26 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan 7 Feb Mar Apr May Jun 21 Jul Aug Sep Oct 2 Nov Dec 26 2016 - 10 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 21:42:28 21:48:22 22:04:10 22:10:26 Oct 1 2 Oct 1, 2016 2 instances 04:41:44 04:44:59 3 3 Oct 3, 2016 3 instances 20:48:00 21:02:53 21:58:32 Nov Dec 29