pre_text: VMware Stock Repurchases VMware purchases stock from time to time in open market transactions, subject to market conditions. The timing of any repurchases and the actual number of shares repurchased will depend on a variety of factors, including VMware’s stock price, cash requirements for operations and business combinations, corporate, legal and regulatory requirements and other market and economic conditions. VMware is not obligated to purchase any shares under its stock repurchase programs. Purchases can be discontinued at any time VMware believes additional purchases are not warranted. From time to time, VMware also purchases stock in private transactions, such as those with Dell. All shares repurchased under VMware’s stock repurchase programs are retired. The following table summarizes stock repurchase activity, including shares purchased from Dell, during the periods presented (aggregate purchase price in millions, shares in thousands): (1) The aggregate purchase price of repurchased shares is classified as a reduction to additional paid-in capital until the balance is reduced to zero and the excess is recorded as a reduction to retained earnings.
table: For the Year Ended
table: January 31, 2020 February 1, 2019 February 2, 2018
table: Aggregate purchase price (1) $1,334 $42 $1,449
table: Class A common stock repurchased 7,664 286 13,977
table: Weighted-average price per share $174.02 $148.07 $103.66
question: Analyse this data from a financial earnings document. What was the change in Aggregate purchase price between 2018 and 2019?