Since the NBA began their Last Two Minute Reports (L2M) on March 1, 2015, there have been 1,934 games which have received referee grades for at least their last two minutes of NBA action. While the general public may not understand the purpose of the L2Ms, the NBA provides a FAQ for why L2Ms exist:
What is the purpose of issuing Last Two Minute Reports?
L2Ms are part of the NBA’s ongoing effort to build a greater awareness and understanding of the rules and processes that govern our game.