Our approach in calculating football inflation mimics the method used to work out inflation on goods and services.
But instead of comparing the average price of a basket of goods, we compare how the average fee for a Premier League player has changed season-on-season.
When Andriy Shevchenko completed his £30.8m move to Chelsea in 2006/07, it gazumped the average Premier League fee, which was around £3.13m.
Fast-forward through 15 more seasons of record-breaking transfers, and this average fee had skyrocketed to £21.9m, approximately seven times larger.
To make Shevchenko's fee reflective of today's transfer market, we multiplied it by seven to arrive at our inflation-adjusted record transfer fee of £215.6m.
This method of comparing the average fee for the season in which the transfer occurred to the average fee of the most recent season was used to calculate all our inflation-adjusted fees.
Our data contained over 3,000 transfer fees, encompassing every season since the Premier League began in 1992.
These fees were obtained from
Sky Sports and
transfermarkt.com, while some were independently sourced by
Sky News.