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 NASCAR drivers who have won in each of top three series
Table title:
Driver championships in two of the top divisions
Table:
<table id='hittask' contenteditable='False'>
<tr> <td colspan=2 rowspan=1 > Driver </td><td class="highlighted"  colspan=2 rowspan=1 > 1st Monster Energy Cup Championship </td><td class="highlighted"  colspan=2 rowspan=1 > 1st Xfinity Championship </td><td colspan=2 rowspan=1 > 1st Gander Outdoors Truck Championship </td></tr>
<tr> <td colspan=1 rowspan=1 > 1. </td><td class="highlighted"  colspan=1 rowspan=1 > Bobby Labonte </td><td class="highlighted"  colspan=1 rowspan=1 > 2000 Champion </td><td class="highlighted"  colspan=1 rowspan=1 > Winston Cup Series </td><td class="highlighted"  colspan=1 rowspan=1 > 1991 Champion </td><td class="highlighted"  colspan=1 rowspan=1 > Busch Series </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2. </td><td colspan=1 rowspan=1 > Greg Biffle </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2002 Champion </td><td colspan=1 rowspan=1 > Busch Series </td><td colspan=1 rowspan=1 > 2000 Champion </td><td colspan=1 rowspan=1 > Craftsman Truck Series </td></tr>
<tr> <td colspan=1 rowspan=1 > 3. </td><td colspan=1 rowspan=1 > Johnny Benson Jr. </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1995 Champion </td><td colspan=1 rowspan=1 > Busch Series </td><td colspan=1 rowspan=1 > 2008 Champion </td><td colspan=1 rowspan=1 > Craftsman Truck Series </td></tr>
<tr> <td colspan=1 rowspan=1 > 4. </td><td colspan=1 rowspan=1 > Brad Keselowski </td><td colspan=1 rowspan=1 > 2012 Champion </td><td colspan=1 rowspan=1 > Sprint Cup Series </td><td colspan=1 rowspan=1 > 2010 Champion </td><td colspan=1 rowspan=1 > Nationwide Series </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 5. </td><td colspan=1 rowspan=1 > Austin Dillon </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2013 Champion </td><td colspan=1 rowspan=1 > Nationwide Series </td><td colspan=1 rowspan=1 > 2011 Champion </td><td colspan=1 rowspan=1 > Camping World Truck Series </td></tr>
<tr> <td colspan=1 rowspan=1 > 6. </td><td colspan=1 rowspan=1 > Kevin Harvick </td><td colspan=1 rowspan=1 > 2014 Champion </td><td colspan=1 rowspan=1 > Sprint Cup Series </td><td colspan=1 rowspan=1 > 2001 Champion </td><td colspan=1 rowspan=1 > Busch Series </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 7. </td><td colspan=1 rowspan=1 > Kyle Busch </td><td colspan=1 rowspan=1 > 2015 Champion </td><td colspan=1 rowspan=1 > Sprint Cup Series </td><td colspan=1 rowspan=1 > 2009 Champion </td><td colspan=1 rowspan=1 > Nationwide Series </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 8. </td><td colspan=1 rowspan=1 > Martin Truex Jr. </td><td colspan=1 rowspan=1 > 2017 Champion </td><td class="highlighted"  colspan=1 rowspan=1 > Monster Energy Cup Series </td><td colspan=1 rowspan=1 > 2004 Champion </td><td colspan=1 rowspan=1 > Busch Series </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
How did Bobby Labonte do in NASCAR in 2000 and 1991?
Answer:
Bobby Labonte won a championship in 2000, at the NASCAR Winston Cup Series (now the Monster Energy NASCAR Cup Series), and a championship in 1991 at the Busch Series (now the Xfinity Series).