Historical clue formulations

• Distance ÷ time: Abbr. — 2016-10-05
• Going rate?: Abbr. — 2012-12-08
• Speed: Abbr. — 2012-02-02
• M.p.h., e.g. — 2008-03-19
• Speed: Abbr. — 2007-10-25
• Speed: Abbr. — 2007-03-04
• M.p.h. — 2005-12-04
• Distance divided by time: Abbr. — 2003-10-05
• Speed: Abbr. — 2000-10-31
• Speed: Abbr. — 2000-08-21
• Anemometer reading: Abbr. — 1999-12-24
• Speed: Abbr. — 1999-05-08
• Speed: Abbr. — 1999-02-16
• M.P.H. — 1998-07-10
• Speed: Abbr. — 1995-02-04