Study the given bar graphs and answer the question that follows.
The bar graphs represent the amount invested in raw materials (in ₹ 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 ₹ crore) in figure 1 and sale of products in figure 2, respectively.

                                                                      Figure 1  

                                                                      Figure 2
In which year was there a maximum percentage increase in the sales of products as compared to the previous year?