26 instances from 6 years 2020 - 1 instance Jan 18 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2019 - 2 instances Jan Feb 27 Mar Apr May Jun Jul Aug Sep Oct 26 Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 21 22 26 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan 7 Feb Mar Apr May Jun 22 Jul Aug Sep Oct 3 Nov Dec 26 2016 - 15 instances Jan Feb 18 Mar Apr May Jun 20 21 3 Jun 21, 2016 3 instances 03:05:01 03:27:33 06:25:45 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 01:47:48 01:56:26 02:09:18 02:16:30 Oct 1 2 Oct 1, 2016 2 instances 08:49:50 08:50:12 4 3 Oct 4, 2016 3 instances 00:53:56 01:08:01 02:04:21 Nov Dec 29 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 17