Of the first 50 queens of which I took a record, between 1985 and 1995, 7 (14%) lived to 4 years, 13 3 years, 17 2 years and 13 1 year. Average 2.28 years. The next 50, only 1 lasted 4 years, 8 3 years, 22 2 years and 19 1 year. Average 1.82 years. The 3rd 50 (2001 - 2007) 1 lasted 5 years, 3 4 years, 8 3 years, 8 3 years, 27 2 years, 11 1 year. Average 2.12 years. The 4th 50 7 lasted 3 years, 29 2 years, 14 1 year. Average 1.86. The 5th 50: 7 lasted 3 years, 21 2 years, 22 1 year. Average 1.7 years. The 6th 50 (2011 - 2017: 4 lasted 4 years, 8 3 years, 21 2 years and 17 1 year. Average 1.98.
So it appears that there has been a reduction in longevity but not overwhelming.
Chris
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