pre_text: Performance Share Plan The relevant disclosures in respect of the Performance Share Plan grants are set out below.
table: 2015 Grant 2016 Grant 2017 Grant 2018 Grant 2019 Grant
table: Grant date 11th June 5th April 26th May 4th April 15th May
table: Mid market share price at grant date 3,460.0p 3,550.0p 5,256.0p 5,560.0p 8,161.0p
table: Number of employees 15 13 12 12 12
table: Shares under scheme 70,290 69,890 62,356 60,899 60,626
table: Vesting period 3 years 3 years 3 years 3 years 3 years
table: Probability of vesting 71.5% 70.8% 73.1% 73.5% 74.1%
table: Fair value 2,473.9p 2,513.4p 3,842.1p 4,084.4p 6,048.9p
question: Analyse this data from a financial earnings document. What was the change in the number of shares under scheme under the 2019 Grant from the 2018 Grant?