Mayank spends his yearly salary on two types of expenses only (given in the chart above) and saves the remaining amount. Given above is the graphical representation of his yearly salary and expenses over the four-year period.
Salary = Total Expenses + Savings
If regular household expenses as a percentage of salary exceed 50%, then the living style in that year is said to be aristocratic. How many years Mayank has lived aristocratically in all the years given above?