Changes in prefix status from May->Aug 2001 transitions are from columns to rows from May to August 2001 equal number of prefixes moved from standalones to roots/m.s.'s more prefixes changed from m.s. to standalone than v.v. "Vacuum" counts prefixes which appeared or disappeared St.al Root M.sp Vac Sum Out St.al 38676 544 576 2450 42246 8.45 Root 377 4374 40 307 5098 14.20 M.sp 917 41 42188 8746 51892 18.70 Vac 4232 420 9206 0 13858 100.00 In 13.08 19.71 18.93 83.01 99236r Sum 44202 5379 52010 11503 101591c