31 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 5 instances Jan 20 Feb Mar Apr May Jun 28 Jul 2 Aug Sep Oct Nov 13 18 Dec 2019 - 6 instances Jan Feb 18 2 Feb 18, 2019 2 instances 12:07:38 12:07:40 27 Mar Apr May Jun Jul 20 Aug Sep 18 Oct 26 Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 22 23 27 Jul Aug Sep Oct Nov Dec 2017 - 7 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 10:15:44 11:12:51 Jul Aug 29 Sep Oct 4 Nov 20 Dec 27 2016 - 9 instances Jan Feb Mar Apr May Jun Jul Aug Sep 24 2 Sep 24, 2016 2 instances 23:31:19 23:55:39 25 2 Sep 25, 2016 2 instances 05:14:05 07:44:58 30 Oct 3 3 Oct 3, 2016 3 instances 15:01:44 15:15:45 15:59:21 Nov Dec 29