Property Tax vs Year Appraised Value?

A new built house I'm in the process of buying was appraised for 89,000 in 2008 and appraised for 141,000 in 2009. Based on what appraised value am I suppose to pay, 89,000 or 141,000, at the end of the year or on my escrow account? Note: The builder is paying for the time before closing.