By Matt Hardy Premiership rugby’s opening-round attendances have fallen to a five-season low. Since the start of the 2016-17 season, and not including the pandemic-affected 2020-21 season, the percentage of seats filled by punters in England’s top division during the first round has never been lower than last weekend. The opening round saw 59 per cent of seats occupied by supporters, down from 66 per cent for the first weekend last year and a high of 82 per cent in 2018-19. And the figure drops to 55 per cent if you exclude the two matches postponed following the passing of Queen Elizabeth II….