Final answer:
The percent increase between 1990 and 2000 is approximately 61.4%.
Step-by-step explanation:
To find the percent increase, we need to calculate the difference between the two prices and then divide it by the original price. The formula for percent increase is:
(New Value - Original Value) / Original Value * 100%
Using the given numbers:
(23609 - 14649) / 14649 * 100% = 0.61399... * 100% = 61.4%
Rounding to the nearest tenth, the percent increase is approximately 61.4%.