Answer the following question based on the information given below.
The bar chart shows the revenue received, in million US Dollars (USD), from subscribers to a particular Internet service. The data covers the period 2003-2007 for the Unites States (US) and Europe. The bar chart also shows the estimated revenues from subscription to this service for the period 2008 – 2010.
Consider the annual percent change in the gap between subscription revenues in the US and Europe. What is the year in which the absolute value of this change is the highest?