22 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 3 instances Jan 19 Feb Mar Apr May Jun 28 Jul Aug Sep Oct Nov 13 Dec 2019 - 1 instance Jan Feb Mar Apr May Jun 22 Jul Aug Sep Oct Nov Dec 2018 - 9 instances Jan 4 2 Jan 4, 2018 2 instances 21:25:46 21:26:16 5 4 Jan 5, 2018 4 instances 04:40:09 04:43:30 04:43:59 04:47:21 Feb Mar Apr May Jun 28 30 Jul 1 Aug Sep Oct Nov Dec 2017 - 7 instances Jan 6 Feb Mar Apr May Jun Jul Aug 29 4 Aug 29, 2017 4 instances 16:07:45 16:08:25 16:54:40 16:56:28 Sep Oct 3 Nov Dec 25 2016 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 29