20 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 3 instances Jan 18 Feb Mar Apr May Jun 29 Jul Aug Sep Oct Nov 13 Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct 26 Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 04:25:42 13:20:44 18:07:53 Jul Aug Sep Oct Nov Dec 2017 - 5 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 10:09:40 11:06:37 Jul Aug Sep Oct 2 Nov Dec 26 2016 - 6 instances Jan Feb Mar Apr May Jun Jul Aug Sep 30 2 Sep 30, 2016 2 instances 21:42:47 22:51:32 Oct 3 3 Oct 3, 2016 3 instances 14:56:18 15:09:28 15:54:02 Nov Dec 29