pre_text: 5.3.4 HOOQ's share options - equity-settled arrangement In December 2015, HOOQ Digital Pte. Ltd. (“HOOQ”), a 65%-owned subsidiary of the Company, implemented the HOOQ Digital Employee Share Option Scheme (the “Scheme”). Selected employees (including executive directors) of HOOQ and/or its subsidiaries are granted options to purchase ordinary shares of HOOQ. Options are exercisable at a price no less than 100% of the fair value of the ordinary shares of HOOQ on the date of grant, and are scheduled to be fully vested 4 years from the vesting commencement date.
  Options are exercisable at a price no less than 100% of the fair value of the ordinary shares of HOOQ on the date of grant, and are scheduled to be fully vested 4 years from the vesting commencement date. The grant dates, exercise prices and fair values of the share options were as follows – The term of each option granted is 10 years from the date of grant. The fair values for the share options granted were estimated using the Black-Scholes pricing model. From 1 April 2018 to 31 March 2019, options in respect of an aggregate of 9.6 million of ordinary shares in HOOQ have been granted. As at 31 March 2019, options in respect of an aggregate of 43.3 million of ordinary shares in HOOQ are outstanding.
table: Equity-settled Exercise price Fair Value at grant date
table: Date of grant US$ US$
table: 16 May 2016 0.07 0.0445 to 0.0463
table: 24 April 2017 0.07 0.0301 to 0.0315
table: 2 May 2017 0.07 0.0292 to 0.0313
table: 31 July 2017 0.07 0.0313 to 0.0315
table: 8 September 2017 0.07 0.0296 to 0.0298
table: 23 October 2017 0.07 0.0309 to 0.0320
table: 10 January 2018 0.07 0.0316 to 0.0318
table: 1 April 2018 0.07 0.0360 to 0.0366
table: 1 July 2018 0.07 0.0368 to 0.0373
table: 19 October 2018 0.07 0.0371 to 0.0374
table: 31 January 2019 0.07 0.0367 to 0.0369
question: Analyse this data from a financial earnings document. As at 31 March 2017, options in respect of how many ordinary shares in HOOQ were outstanding?