What record does Janet Evans still hold and when did she get it?

Woman's 800 meters freestyle world record holder (long course) July 27, 1987-August 19, 1987,Woman's 800 meters freestyle world record holder (long course) March 22, 1988-August 16, 2008,Woman's 1500 meters freestyle world record holder (long course) July 31, 1987 - June 17, 2007,Woman's 400 meters freestyle world record holder (long course) December 20, 1987-May 12, 2006