Study the given bar graphs and answer the question that follows.

The bar graphs represent the amount invested in raw materials (in Rs. crore) and the sale of the products, by a textile company in the years 2007- 2012. The X-axis represents the years. The Y-axis represents the amount invested in raw materials (in Rs, crore) in figure 1 and the sale of products in figure 2, respectively.

In which year was there a maximum percentage increase in the sales of products as compared to the previous year?