Table:
|  | 2019 | 2018 |
| --- | --- | --- |
|  | Number | Number |
| Outstanding at 1 April | 303,880 | 248,263 |
| Options granted in the year | 71,552 | 127,691 |
| Dividend shares awarded | 3,343 | 1,306 |
| Options forfeited in the year | – | (73,380) |
| Options exercised in the year | (229,378) | – |
| Outstanding at 31 March | 149,397 | 303,880 |
| Exercisable at 31 March | – | 74,686 |
Paragraphs:
29. Share-based payments continued
The number of options outstanding and exercisable as at 31 March was as follows:
The weighted average market value per ordinary share for DABP options exercised in 2019 was 438.1p (2018: n/a). The DABP awards outstanding at 31 March 2018 have a weighted average remaining vesting period of 0.8 years (2018: 1.2 years) and a weighted average contractual life of 8.8 years (2018: 9.2 years). The charge for the year includes an estimate of the awards to be granted after the balance sheet date in respect of achievement of 2019 targets.
Question:
In which years was the number of options outstanding at 31 March calculated?