As a result of the closure of the mine at which he had been employed, Les Orr received a $27,000 severance settlement on his fifty-third birthday. He “rolled” the severance pay into a new RRSP and then, at age 62, used the accumulated funds to purchase an annuity paying $491.31 at the beginning of each month. If the RRSP and the annuity earn 8.5% compounded annually, what is the term of the annuity?