18 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 2 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 13 14 Dec 2019 - 1 instance Jan Feb Mar Apr May Jun 22 Jul Aug Sep Oct Nov Dec 2018 - 2 instances Jan 5 Feb Mar Apr May Jun Jul 18 Aug Sep Oct Nov Dec 2017 - 3 instances Jan 8 Feb Mar Apr May Jun 23 Jul Aug Sep Oct 7 Nov Dec 2016 - 9 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2016 2 instances 14:14:17 15:20:33 Jul Aug Sep 20 Oct 1 2 Oct 1, 2016 2 instances 21:56:09 23:10:17 4 3 Oct 4, 2016 3 instances 16:29:25 17:03:12 19:40:56 Nov Dec 30