 For a school district with a market value/personal income aid ratio (MV/PI AR) greater than 0.4000, its index equals the base index multiplied by the sum of .75 and its MV/PI AR for the current year.The School District Adjusted Index for the West Perry School District 2006–2007 through 2010–2011.For the 2016-17 budget year, West Perry School Board applied for two exceptions to exceed the district's Act 1 Index limit