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
Fullerton Fund Investments Pte Ltd
By:	/s/ Cheong Kok Tim
Name:	Cheong Kok Tim
Title:	Director
Seletar Fund Investments Pte Ltd
By:	/s/ Lim Siew Lee Sherlyn
Name:	Lim Siew Lee Sherlyn
Title:	Director
Clemenceau Investments Pte Ltd
By:	/s/ Tan Lay Khim
Name:	Tan Lay Khim
Title:	Director