Gallup conducts an annual poll of residents of 130 countries around the world to ask about...

Gallup conducts an annual poll of residents of 130 countries around the world to ask about approval of world leadership. The graph below shows the percentage of respondents who approve of the job performance of the leadership of the United States and Great Britain from the years 2007 to 2012. Estimate the year in which the break-even point (the year in which the opinion on leadership was the same) occurred.