That's well above the 6.3%, or about one of 16, average for the league, according to NBA.com's statistical website, and it threatened Danny Fortson's 16.7% rejection rate in 1997-98, which is the highest for anyone who has attempted at least 500 field goals in a season since 1997, the earliest for which NBA.com has data.
WSJ: One NBA Player's Life of Constant Rejection: Tristan Thompson