20 instances from 4 years 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct 26 Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 22 23 27 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan 7 Feb Mar Apr May Jun 23 Jul Aug Sep Oct 3 Nov Dec 27 2016 - 12 instances Jan Feb Mar Apr May Jun 20 21 3 Jun 21, 2016 3 instances 00:04:25 00:26:00 09:22:16 Jul Aug Sep 20 2 Sep 20, 2016 2 instances 12:03:48 12:28:41 Oct 1 2 Oct 1, 2016 2 instances 19:04:08 19:14:32 4 3 Oct 4, 2016 3 instances 11:21:33 11:32:21 12:30:20 Nov Dec 30