Assume the annual rate of change in the national debt of a country (in billions of dollars per year) can be modeled by the function e D'(t) = 855.08 + 817.64t ' 199.0312 + 12.52:3 _ where t is the number of years since 1995. By how much did the debt Increase between 1996 and 2005? The debt increased by 3'] billion. (Round to two decimal places as needed.)