Why hasn’t free-throw shooting improved through the years?

Free Throw Percentage - photo from KansasCity.com
Free Throw Percentage - image from KansasCity.com

From the City Star, “We start this science story with a history lesson.  In 1978, NFL kickers made 63.1 percent of their field-goal attempts and Jim Hines held the 100-meter dash record with a time of 9.95 seconds.  By 2008, NFL kickers made 84.5 percent of their field-goal attempts and Usain Bolt set the 100-meter dash record in a time of 9.69 seconds. Bolt lowered that mark to 9.58 last year.  That’s to be expected, right? You’d expect sporting performances to improve continually through the years.”  Free throw percentage is the exception.

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