April 1997 -- 37-cent tax increase rejected: 45% yes votes, 54% no votes
August 1997 -- 37-cent tax increase rejected: 44% yes votes, 55% no votes
April 1999 -- 49-cent tax increase rejected: 51% yes votes, 49% no votes
June 1999 -- 49-cent tax increase rejected: 49% yes votes, 51% no votes
November 2000 -- 75-cent tax increase rejected: n/a
April 2002 -- 19-cent tax increase rejected: 55% yes votes, 45% no votes (57% needed to pass)