In June 2012, when the World IPv6 Launch initiative begun, many websites (including Google, Facebook, and Yahoo) and networks decided to permanently enable IPv6. At that point, only 1% of all Internet users were connecting over IPv6 (source). Now, four years later, Google stats show that 12% of Internet users access Google over IPv6. Moreover, recent IPv6 Launch Network Operator measurements published by the Internet Society show IPv6 deployment in a number of ISPs to be reaching nearly 50%.