Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Date | Tournament | Winning score | Margin of victory | Runner(s) up |
| --- | --- | --- | --- | --- |
| Jul 13, 1997 | Quad City Classic | –15 (67-66-67-65=265) | 3 strokes | Brandel Chamblee |
| Aug 22, 1999 | Sprint International | 47 pts. (16-13-10-8=47) | 3 points | David Duval |
| Oct 3, 1999 | Buick Challenge | –17 (68-66-66-71=271) | 3 strokes | Stuart Appleby |
| Oct 8, 2000 | Michelob Championship at Kingsmill | –13 (68-70-67-66=271) | Playoff | Mike Weir |
| May 6, 2001 | Compaq Classic of New Orleans | –22 (66-63-64=266) | 2 strokes | Phil Mickelson |
| Aug 19, 2001 | PGA Championship | –15 (66-65-65-69=265) | 1 stroke | Phil Mickelson |
| Oct 7, 2001 | Michelob Championship at Kingsmill | –15 (64-70-67-68=269) | 1 stroke | Kirk Triplett |
| May 11, 2003 | Wachovia Championship | –10 (70-69-66-73=278) | 2 strokes | Robert Gamez |
| July 29, 2003 | FedEx St. Jude Classic | –20 (68-67-65-64=264) | 3 strokes | Nick Price |
| May 30, 2004 | FedEx St. Jude Classic | –16 (67-63-65-73=268) | 6 strokes | Bob Estes |
| Feb 27, 2005 | WGC-Accenture Match Play Championship | 6 & 5 | 6 & 5 | Chris DiMarco |
| Jan 15, 2006 | Sony Open in Hawaii | –19 (66-69-61-69=261) | 5 strokes | Chad Campbell , Rory Sabbatini |
| May 22, 2011 | Crowne Plaza Invitational at Colonial | –15 (62-62-74-67=265) | 1 stroke | Charlie Wi |
Question:
What is the margin of victory for PGA Championship?
Answer:
1 stroke