Exhibit 99.1

JOINT FILING AGREEMENT

We, the signatories of this Statement on Schedule 13G to which this Agreement is attached, hereby agree that such Statement is, and any amendments thereto filed by any of us will be, filed on behalf of each of us..

Dated: February 12, 2018		TEMASEK HOLDINGS (PRIVATE) LIMITED
	By:	/s/ Choo Soo Shen Christina
		Name: Choo Soo Shen Christina
		Title: Authorized Signatory
Dated: February 12, 2018		FULLERTON FUND INVESTMENTS PTE LTD
	By:	/s/ Cheong Kok Tim
		Name: Cheong Kok Tim
		Title: Director
Dated: February 12, 2018		HAVELOCK FUND INVESTMENTS PTE LTD
	By:	/s/ Lim Siew Lee Sherlyn
		Name: Lim Siew Lee Sherlyn
		Title: Director