do i have to show the amount mentioned in i20 for 2 years or is it enough to show the amount for 1year. please ans me i have a great confusion over it.

in my i20 the amount mentioned is 20lakhs per year. IS it enough if i show 20lakhs during my visa interview or do i need to show total 40lakhs per 2years in my account.

Please clarify my doubt regarding the amount i need to show to them.