<page_title> List of NBA champions </page_title> <section_title> Results by teams </section_title> <table> <cell> Chicago Bulls <col_header> Teams </col_header> </cell> <cell> 1991, 1992, 1993, 1996, 1997, 1998 <col_header> Year(s) won </col_header> </cell> </table>
The Chicago Bulls won six NBA championships between 1991 and 1998.