20 instances from 5 years 2021 - 1 instance Jan Feb Mar 21 Apr May Jun Jul Aug Sep Oct Nov Dec 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 7 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2018 6 instances 04:18:03 04:18:06 04:18:07 04:18:40 04:18:44 19:46:27 23 Jul Aug Sep Oct Nov Dec 2017 - 9 instances Jan 7 2 Jan 7, 2017 2 instances 10:33:09 11:27:18 8 Feb Mar Apr May Jun 21 4 Jun 21, 2017 4 instances 02:55:53 04:15:46 04:17:36 04:18:14 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 03:23:42 04:54:39 Nov Dec 2016 - 2 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct 23 2 Oct 23, 2016 2 instances 04:06:56 05:28:41 Nov Dec