7 instances from 2 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 01:23:51 02:20:37 03:07:49 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct 2 3 Oct 2, 2017 3 instances 01:18:45 01:23:25 01:33:10 Nov Dec 25