Adjusted R-squared is .8203 (1932-present), .8438 (1950-present), and .8442 (1974-present) for all three variables. In the most recent decade (2005-present), the two-variable model of Missed XPs and Made FGs offers the best fit, with Adjusted R-squared of .8401. For 1932-present, the regression equation is Non-Football Scores (as a % of all scores in a given season) = -0.04117 + 0.08961 * Made FGs per team per game + 0.25687 * Missed XPs per team per game + 0.24206 * 2P conversion attempts per team per game