234/264 Notes to the 2017 consolidated financial statements Activity in the RSUs and RSAs outstanding and related information is as follows: RSU RSA Number of RSUs Weighted average grant date fair value Number of RSAs Weighted average grant date fair value US$ US$ Outstanding at January 1, 2015 849,520 30.38 158,720 23.90 Granted 118,440 43.15 — — Forfeited (228,920 ) 30.38 — — Vested (111,560 ) 30.38 (79,360 ) 23.90 Outstanding at December 31, 2015 627,480 32.78 79,360 23.90 Granted 176,080 41.85 — — Forfeited (140,000 ) 30.38 — — Released (162,080 ) 32.53 (79,360 ) 23.90 Outstanding at December 31, 2016 501,480 36.73 — — Granted 80,920 59.63 61,880 90.65 Forfeited (85,903 ) 37.43 — — Released (300,560 ) 38.95 — — Outstanding at December 31, 2017 195,937 42.46 61,880 90.65 Activity in the share options outstanding and related information is as follows: ESOP Non­employee options Number of options Weighted average exercise price Number of options Weighted average exercise price US$ € Outstanding at January 1, 2015 6,972,760 12.75 4,069,600 2.43 Granted 3,347,640 40.38 — — Forfeited (316,880 ) 20.03 (4,069,600 ) (2.43 ) Exercised (711,400 ) 9.43 — — Expired (100,000 ) 15.23 — — Outstanding at December 31, 2015 9,192,120 22.80 — — Granted 6,020,360 41.90 — — Forfeited (512,560 ) 36.03 — — Exercised (3,661,480 ) 10.15 — — Expired (61,960 ) 20.93 — — Outstanding at December 31, 2016 10,976,480 36.88 — — Granted 5,819,520 64.11 — — Forfeited (659,000 ) 46.34 — — Exercised (1,422,520 ) 22.23 — — Expired (67,760 ) 28.49 — — Outstanding at December 31, 2017 14,646,720 48.73 — — Exercisable at December 31, 2015 4,927,200 13.18 — — Exercisable at December 31, 2016 3,765,000 29.98 — — Exercisable at December 31, 2017 5,822,400 39.62 — — F­41