The Friday File: The NBA introduced the 3-point shot in 1979/80. That year, 3-point shots were 3.1% of all shots. By 1990, it was 7.6%, it was 16.7% in 2000, and 22.2% in 2010. Then Stephen Curry changed everything. This season, 33.7% of shots were treys! Now, so many teams are shooting treys, Golden State is average in the percentage of 3-pointers it takes. In Houston, it’s an astounding 50%!