If the returns on Stock A are as follows: Year 1 return = -17 %, Year 2 return = -2 %, Year 3 return = -9 %, Year 4 return = -16 %, and Year 5 return = -18 %, what is the average return for Stock A over this 5 year period? (Record your answer as a percent rounded to 1 decimal place. If your answer is negative, place a minus sign before your number with no space between the sign and the number. For example, record negative 14.284% as -14.3).