Yes , the wiki link says he had a broken collar bone and slight burns to his back . took 30 minutes to get a helicopter there . It also says this . De Angelis's place in the Brabham team was subsequently taken by Derek Warwick, allegedly because Warwick was the only available top level driver who did not contact team owner Bernie Ecclestone immediately after de Angelis's death asking to replace him.
2013 and 2015 both wrong. A boring fact, and probably doesn't help that much, the first time all entrants finished a race was in fact the 1961 Dutch GP, 15 starters, 15 finishers.
That is the year of one of the races where all starters finished..............guess which race that was!?