JOINT FILING AGREEMENT

Exhibit 1

JOINT FILING AGREEMENT

In accordance with rule 13d-1(k) under the Securities Act of 1934, as amended, each of the undersigned entities, as applicable, pursuant to a duly executed power of attorney, hereby agrees to this and any future joint filing of Schedule 13G (including any and all amendments thereto) to be made on their behalf and further agrees to the filing of this Agreement as an Exhibit thereto. In addition, each party to this Agreement consents to the filing of this and any future Schedule 13G (including any and all amendments thereto) by Bank of Montreal.

This Agreement may be executed in any number of counterparts all of which taken together shall constitute one and the same instrument.

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement this 14^th day of February, 2018.

				BANK OF MONTREAL
				By:		/s/ Xxxxxxx Xxxx
						Xxxxxxx Xxxx
						Senior Vice President, Deputy General Counsel of Corporate Affairs, and Corporate Secretary
BANK OF MONTREAL IRELAND PLC				BMO ASSET MANAGEMENT CORP.
*				*
BMO ASSET MANAGEMENT INC.				BMO CAPITAL MARKETS CORP.
*				*
BMO CAPITAL MARKETS LIMITED				BMO DELAWARE TRUST COMPANY
*				*
BMO FINANCIAL CORP.				BMO GLOBAL ASSET MANAGEMENT (ASIA) LIMITED
*				*

BMO XXXXXX BANK N.A.				BMO XXXXXX FINANCIAL ADVISORS, INC.
*				*
BMO XXXXXX INVESTMENT MANAGEMENT INC.				BMO INVESTORLINE, INC.
*				*
BMO LIFE ASSURANCE COMPANY				BMO XXXXXXX XXXXX INC.
*				*
F&C ASSET MANAGEMENT PLC				CTC MYCFO, LLC
**				*
LGM (BERMUDA) LTD. (formerly, XXXXX XXXXXX   MANAGEMENT (BERMUDA) LTD.)				LGM INVESTMENTS LIMITED (formerly, XXXXX   XXXXXX MANAGEMENT (EUROPE) LTD.)
*				*
PYRFORD INTERNATIONAL LIMITED				STOKLER XXXXXX WEALTH ADVISORS INC.
*				*
XXXXXX, XXXXXX & HABACHT, LLC
*

* Pursuant to Power of Attorney filed as Exhibit 2 to Schedule 13G filed on February 14, 2014 by the Reporting Persons named herein (File No. 005-59405), which is incorporated by reference.

** Pursuant to Power of Attorney filed as Exhibit 2 to Schedule 13G filed on February 13, 2015 by the Reporting Person named herein (File No. 005-79749), which is incorporated by reference.

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