On January 4, 1960 the price of a stembolt was $18.60. On January 4, 2009 the price of a stembolt was $17.84. Find the average rate of change in the price of a stembolt from 1960 to 2009. Round to the nearest cent.

The average rate of change is $LaTeX: \displaystyle \frac{17.84-18.60}{2009-1960}= -0.02$ dollars per year.