21 instances from 4 years 2020 - 6 instances Jan 21 Feb 13 14 Mar Apr May Jun Jul 2 Aug Sep Oct Nov 13 14 Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct 27 Nov Dec 2018 - 12 instances Jan 6 7 2 Jan 7, 2018 2 instances 18:28:52 20:06:10 8 3 Jan 8, 2018 3 instances 03:59:39 05:56:37 11:37:01 9 2 Jan 9, 2018 2 instances 14:34:54 20:19:53 10 Feb Mar Apr May Jun 22 2 Jun 22, 2018 2 instances 10:32:59 21:10:42 27 Jul Aug Sep Oct Nov Dec 2017 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 25