The first coin with a QR code

The Royal Netherlands Mint issued the world's first coin with a QR code . This is a collectible silver coin with a face value of 5 euros, which is dedicated to the centenary of the Mint in Utrecht. Three days later, a similar gold coin with a face value of 10 euros will be issued, 2011 coins will be issued.

The QR is coded link http://www.q5g.nl . I wonder how much the QR code will be scanned in practice, because the diameter of the coins is only 33 mm, so the code accounts for less than a square centimeter.