This article states that GA mishap rates are up 20% since 2000, while there has been an approximate 85% decrease in commercial operations and associated mishap rates.
It is basically saying at one point that GA pilots are not learning from their mistakes or benefiting from the recent advances in safety cultures and programs.

Deadly Private-Plane Crashes Prompt U.S. Call for Basics - Businessweek

Do the GA pilots here on APC think they have benefited from the recent safety advancements?

USMCFLYR