Answer the question based on the following information.
The figure below represents sales and net profit in $\text{Rs. crore}$ of IVP Ltd. for five years from $1994-95$ to $1998-99.$ During this period the sales increased from $\text{Rs. 100 crore}$ to $\text{Rs. 680 crore.}$ Correspondingly, the net profit increased from $\text{Rs. 2.5 crore}$ to $\text{Rs. 12 crore.}$ Net profit is defined as the excess of sales over total costs.
The highest percentage growth in net profit, relative to the previous year, was achieved in
- $1998-99$
- $1997-98$
- $1996-97$
- $1995-96$