Final answer:
To calculate the number of years until maturity, subtract the current date from the maturity date.
Step-by-step explanation:
To calculate the number of years until maturity, we need to determine how long it will take for the bond to reach its face value. In this case, the bond has a par value of $1,000 and pays semiannual coupons. The maturity date is not provided in the question, so we cannot calculate the exact number of years. However, if we are given the maturity date, we can subtract the current date (May 2022) from the maturity date to calculate the number of years until maturity.