O.k, let me see. My hair was 24.5 inches long in October 2005 after cutting all the flat-iron damage out. By October 2006 it was BSL (bottom of shoulder-blade length), and by October 2007 it was passing waist length.
I'm not sure how meaningful my figures would be for you, though, because I had lots and lots and lots of trims.
In my abbreviations, Tbone = tailbone.
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