18 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 13 Dec 2019 - 1 instance Jan Feb Mar Apr May Jun 22 Jul Aug Sep Oct Nov Dec 2018 - 1 instance Jan 7 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2017 - 2 instances Jan 9 Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2016 - 12 instances Jan Feb Mar Apr May Jun 20 3 Jun 20, 2016 3 instances 13:45:30 17:11:26 22:24:30 21 Jul Aug Sep 19 2 Sep 19, 2016 2 instances 16:22:34 18:14:50 Oct 2 2 Oct 2, 2016 2 instances 22:52:18 23:14:53 5 3 Oct 5, 2016 3 instances 14:56:29 15:19:30 17:31:35 Nov Dec 31