18 instances from 4 years 2020 - 1 instance Jan Feb Mar Apr May Jun Jul 31 Aug Sep Oct Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 01:17:01 01:17:08 01:17:13 Jul Aug Sep Oct Nov Dec 2017 - 6 instances Jan 6 2 Jan 6, 2017 2 instances 12:51:55 12:52:04 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 01:22:22 01:24:12 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 8 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 08:18:27 08:24:03 08:24:03 08:24:12 30 2 Sep 30, 2016 2 instances 16:19:07 16:24:19 Oct 3 Nov Dec 29