Calculating the Nth Best Performance (unique individuals) with Excel and PowerPivot

Among my life-long hobbies is my favorite: Track and Field. I was never a participant, but I have followed the sport closely for over 40 years. I have served as a coach, an official, an announcer and as a statistician as well as a fan. As an observer, I had noted that number of performances in a number of events seemed to have dropped off in quality over the last 15-20 years. In particular, the great matches between Kirani James and LaShawn Merritt this year over 400 meters seemed to me to be reversing the trend I had observed. Well, it was time to put my Excel PowerPivot skills to work to see whether my observation was just my imagination. First, I located a source of data on the Internet for al-time 400 meter times.