We recently published a QR code statistics report related to this as well.

Summary:

• According to a survey by Statista, a total of 11 million households will scan a QR code by the end of 2020
• $1.65 trillion worth of transactions were done all through QR code payments in 2016 alone. That value has significantly increased in succeeding years, especially since that according to a 2019 QR code statistics survey, 50% of QR code scanners manage to regularly scan QR codes several times a week

QR Code Usage by Age:

QR Code Usage Growth:

And many more data! Feel free to check it out.