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:
| Year | Host / Location | Division I Overall | Division I Undergraduate | Division II Overall | Division II Community College |
| --- | --- | --- | --- | --- | --- |
| 1997 | Penn | Chicago | N/A | N/A | N/A |
| 1998 | Vanderbilt | Stanford | Swarthmore | Harvard | N/A |
| 1999 | Michigan | Chicago | Carleton | Princeton | N/A |
| 2000 | Boston U | Illinois | Princeton | Harvard | N/A |
| 2001 | Washington, St. Louis | Chicago | Princeton | Pittsburgh | N/A |
| 2002 | North Carolina | Michigan | Princeton | Yale | Valencia CC |
| 2003 | UCLA and Caltech | Chicago | Harvard | Berkeley | Valencia CC |
| 2004 | Washington, St. Louis | Cal-Berkeley | Illinois | UCLA | Valencia CC |
| 2005 | Tulane | Michigan | VA Commonwealth | Chicago | Faulkner St CC |
| 2006 | Maryland | Cal-Berkeley | Williams College | Stanford | Broward CC |
| 2007 | Minnesota | Chicago | Carleton | Maryland | Valencia CC |
| 2008 | Washington, St. Louis | Maryland | Harvard | Carleton | Valencia CC |
| 2009 | Dallas, Texas | Chicago | Minnesota | Chicago | Northeast Alabama CC |
| 2010 | Chicago, Illinois | Chicago | Minnesota | Brown | St. Charles CC |
| 2011 | Chicago, Illinois | Minnesota | VCU | Yale | Chipola |
| 2012 | Chicago, Illinois | Virginia | Ohio State | Harvard | Chipola |
| 2013 | Chicago, Illinois | Yale | Ohio State | Stanford | Chipola |
| 2014 | Chicago, Illinois | Virginia | Yale | Harvard | Valencia |
Question:
how many times is harvard listed on the chart?
Answer:
6