Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
List of Chief Judges of the New York Court of Appeals
Table title:
Chief Judges since 1974
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > Took office </th><th colspan=1 rowspan=1 > Left office </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td colspan=1 rowspan=1 > Lawrence H. Cooke </td><td colspan=1 rowspan=1 > January 23, 1979 </td><td colspan=1 rowspan=1 > December 31, 1984 </td><td colspan=1 rowspan=1 > First Chief Judge appointed by the Governor under constitutional amendment of 1977; age-limited </td></tr>
<tr> <td colspan=1 rowspan=1 > Sol Wachtler </td><td colspan=1 rowspan=1 > January 2, 1985 </td><td colspan=1 rowspan=1 > November 11, 1992 </td><td colspan=1 rowspan=1 > Resigned </td></tr>
<tr> <td colspan=1 rowspan=1 > Richard D. Simons (acting) </td><td colspan=1 rowspan=1 > November 17, 1992 </td><td colspan=1 rowspan=1 > March 22, 1993 </td><td colspan=1 rowspan=1 > Acted until the appointment of a successor </td></tr>
<tr> <td colspan=1 rowspan=1 > Judith S. Kaye </td><td colspan=1 rowspan=1 > March 23, 1993 </td><td colspan=1 rowspan=1 > December 31, 2008 </td><td colspan=1 rowspan=1 > Reached mandatory retirement age; Chief Judge with the longest tenure (more than 15 years), only Chief Judge to complete a 14-year term </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Jonathan Lippman </td><td class="highlighted"  colspan=1 rowspan=1 > February 11, 2009 </td><td class="highlighted"  colspan=1 rowspan=1 > December 31, 2015 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Eugene F. Pigott, Jr. (acting) </td><td colspan=1 rowspan=1 > January 1, 2016 </td><td colspan=1 rowspan=1 > January 21, 2016 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Janet DiFiore </td><td colspan=1 rowspan=1 > January 21, 2016 </td><td colspan=1 rowspan=1 > incumbent </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
How long did Jonathan Lippman serve as the Chief Judge?
Answer:
Jonathan Lippman served 6 years as Chief Judge of the New York Court of Appeals from 2009 through 2015.