18 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 6 Dec 2020 - 4 instances Jan 20 Feb Mar Apr May Jun 28 30 Jul Aug Sep Oct Nov 14 Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 2 Jul 20, 2019 2 instances 11:03:09 17:58:21 Aug Sep Oct Nov Dec 2018 - 4 instances Jan 8 Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:55:20 11:26:03 19:52:20 Jul Aug Sep Oct Nov Dec 2017 - 6 instances Jan 7 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 08:22:36 15:14:37 Jul Aug Sep Oct 2 Nov Dec 25 26 2016 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 30