EXHIBIT 99.1



                            Explanation of Responses
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Footnote (1)      GMAM Investment Funds Trust II (the "Trust"), a group trust
                  organized for the benefit of certain trusts under certain
                  employee benefit plans, holds the securities referred to in
                  line 2 of table 1 (the "Securities"). The reporting person
                  ("GMIMCO") has retained under the Employee Retirement Income
                  Security Act of 1974, as amended, the power to direct the
                  voting and disposition of the Securities although it has no
                  pecuniary interest therein. General Motors Trust Company is
                  the trustee (the "Trustee") with respect to the Trust. GMIMCO
                  is serving as investment manager with respect to the Trust and
                  in that capacity it has the sole power to direct the Trustee
                  as to the voting and disposition of the Securities. Because of
                  the Trustee's limited role in the voting and disposition of
                  the Securities, beneficial ownership of the Securities by the
                  Trustee is disclaimed. Line 1 of Table 1 relates to GMIMCO's
                  status as a 10% beneficial owner without pecuniary interest
                  with respect to the Securities. Line 2 of Table 1 relates to
                  the status of the Trust on behalf of which GMIMCO is making
                  the report reflected on such line as a 10% beneficial owner
                  that may have a pecuniary interest in the Securities. This
                  filing should not be deemed an admission that either GMIMCO or
                  the Trust is the beneficial owner of the Securities.