Go through the data set given below and solve the questions based on it.
The following graph captures the demand and supply situation of Rin supreme bars in a town Patna over the years 2003-2008.
Patna had an inventory of 20,000 bars at the start of 2003. In which year was the deficit of bars the highest? [Deficit is defined as demand minus available quantity and available quantity is supply of year plus the inventory. In a year where availability is less than the demand, the demand goes unsatisfied in that year and is not carried forward. Excess availability over demand goes into inventory]