See the multi-choice question below:

Sentence 1: In addition, between 1995 and 1999, the development contract target price increased by 165 percent.

Sentence 2: The sharpest increase on a year to year basis was between 1997 and 1998.

If the first sentence is true, then is the second sentence true?
Choose from: - yes. - it is not possible to tell. - no.
it is not possible to tell