UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D/A
Under the Securities Exchange Act of 1934
(Amendment No. 23)

          If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box o.

(Continued on the following pages)
(Page 1 of 9 Pages)

CUSIP NO. 40009 52 0

13D

Page 2 of 9 Pages

CUSIP NO. 40009 52 0

13D

Page 3 of 9 Pages

CUSIP NO. 40009 52 0

13D

Page 4 of 9 Pages

CUSIP NO. 40009 52 0

13D

Page 5 of 9 Pages

CUSIP NO. 40009 52 0

13D

Page 6 of 9 Pages

          This Amendment No. 23 (this "Amendment No. 23" or this "filing") amends in certain respects Amendment No. 1 to Schedule 13D filed by Mike Kojaian and C. Michael Kojaian dated February 13, 2001 ("Amendment No. 1"); Amendment No. 2 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, Kojaian Ventures, L.L.C., a Michigan limited liability company ("KV"), and Kojaian Ventures-MM, Inc., a Michigan corporation and managing member of KV ("KVMM") dated April 19, 2002 ("Amendment No. 2"); Amendment No. 3 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, KV and KVMM dated May 16, 2002 ("Amendment No. 3"); Amendment No. 4 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, KV and KVMM dated September 27, 2002 ("Amendment No. 4"); Amendment No. 5 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, Kojaian Holdings LLC, a Michigan limited liability company ("KH"), KV, KVMM dated May 9, 2003 ("Amendment No. 5"); Amendment No. 6 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, KH, KV, and KVMM dated January 6, 2005 ("Amendment No. 6"); Amendment No. 7 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, Kojaian Management Corporation ("KMC"), KH, KV, and KVMM dated April 28, 2006 ("Amendment No. 7"); Amendment No. 8 to Schedule 13D filed by C. Michael Kojaian, KMC, KH, KV, and KVMM dated July 6, 2006 ("Amendment No. 8"); Amendment No. 9 to Schedule 13D filed by C. Michael Kojaian, KMC, KH, KV, and KVMM dated May 22, 2007 ("Amendment No. 9"); Amendment No. 10 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, KMC, KH, KV, and KVMM dated September 7, 2007 ("Amendment No. 10"); Amendment No. 11 to Schedule 13D filed by Mike Kojaian and C. Michael Kojaian, KMC, KH, KV, and KVMM dated September 14, 2007 ("Amendment No. 11"); Amendment No. 12 to Schedule 13D filed by C. Michael Kojaian, KMC, KH, KV, and KVMM dated December 10, 2007 ("Amendment No. 12"); Amendment No. 13 to Schedule 13D filed by C. Michael Kojaian, KMC, KH, KV, and KVMM dated March 5, 2008 ("Amendment No. 13"); Amendment No. 14 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, KMC, KH, KV, and KVMM dated June 16, 2008 ("Amendment No. 14"); Amendment No. 15 to Schedule 13D filed by C. Michael Kojaian, KMC, KH, KV, and KVMM dated August 22, 2008 ("Amendment No. 15"); Amendment No. 16 to Schedule 13D filed by C. Michael Kojaian, KMC, KH, KV, and KVMM dated September 3, 2008 ("Amendment No. 16"); Amendment No. 17 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, KMC, KH, KV, and KVMM dated June 12, 2009 ("Amendment No. 17"); Amendment No. 18 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, KMC, KH, KV, and KVMM dated October 2, 2009 ("Amendment No. 18"); Amendment No. 19 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, KMC, KH, KV, and KVMM dated November 6, 2009 ("Amendment No. 19"); Amendment No. 20 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, KMC, KH, KV, and KMM dated September 22, 2010 ("Amendment No. 20"); Amendment No. 21 to Schedule 13D filed by Mike Kojaian, C. Michael Kojaian, KMC, KH, KV, and KMM dated February 28, 2011 ("Amendment No. 21"); and Amendment No. 22 to Schedule 13D filed by C. Michael Kojaian, KMC, KH, KV, and KMM dated April 22, 2011 ("Amendment No. 22") (collectively the "Previous Filings"). All items not reported in this Amendment No. 23 are herein incorporated by reference from the Previous Filings. To the extent any item is superseded by any later filing, the later filing is operative and controlling.

          Item 1 of the Previous Filings is here incorporated by reference.

Item 2.

Identity and Background

          This Amendment No. 23 is being filed by C. Michael Kojaian, KMC, KVMM, KV, and KH (collectively, the "Reporting Persons"). Item 2 of the Previous Filings is here incorporated by reference.

          Not applicable.

          The Reporting Persons are filing this Amendment No. 23 to report that on February 10, 2012, C. Michael Kojaian resigned from his position as a director of the Company. Mr. Kojaian informed the Board of Directors of the Company that his resignation will permit him to attend to his fiduciary duties as a director of KV and its affiliated entities in commercial transactions with the Company without actual or apparent conflicts of interest.

          Except as reported, the Reporting Persons have no present plans or proposals that would result in the events described in Item 4 of Securities and Exchange Commission Schedule 13D. The Reporting Persons reserve the right to determine in the future whether to adopt plans or proposals of the type described in Item 4.

          Item 5 of the Previous Filings is here incorporated by reference.

          Item 6 of the Previous Filings is here incorporated by reference. Item 4 of this Amendment No. 23 is here incorporated by reference.

SIGNATURES

          After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.