20 instances from 5 years 2020 - 1 instance Jan 18 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct 26 Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:39:01 12:57:17 17:40:55 Jul Aug Sep Oct Nov Dec 2017 - 2 instances Jan 8 Feb Mar Apr May Jun 23 Jul Aug Sep Oct Nov Dec 2016 - 12 instances Jan Feb Mar Apr May Jun 21 22 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 15:44:32 16:35:04 21:16:02 21:33:35 Oct 1 2 Oct 1, 2016 2 instances 22:25:04 23:38:59 4 3 Oct 4, 2016 3 instances 17:04:20 17:32:41 20:10:38 Nov Dec 30