20 instances from 4 years 2019 - 1 instance Jan Feb 18 Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2017 - 3 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 01:46:27 01:48:14 Jul Aug Sep Oct Nov Dec 2016 - 15 instances Jan Feb 17 Mar Apr May Jun 20 4 Jun 20, 2016 4 instances 08:16:21 08:41:26 09:57:20 14:13:07 Jul Aug Sep 19 4 Sep 19, 2016 4 instances 10:05:46 10:06:16 10:10:31 11:28:59 30 Oct 3 4 Oct 3, 2016 4 instances 09:17:16 10:05:50 10:22:05 11:37:47 Nov Dec 29 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 16