18 instances from 4 years 2021 - 1 instance Jan Feb Mar 20 Apr May Jun Jul Aug Sep Oct Nov Dec 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 7 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2018 6 instances 04:51:23 04:51:25 04:51:27 04:54:05 04:54:09 19:59:37 23 Jul Aug Sep Oct Nov Dec 2016 - 9 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 15:47:14 15:52:51 15:52:57 15:53:20 Oct 1 2 Oct 1, 2016 2 instances 03:06:24 03:14:22 3 3 Oct 3, 2016 3 instances 21:22:41 21:24:11 21:24:13 Nov Dec