Luna, a self-employed accountant, currently earns $100,000 annually. Luna has been able to save 18% of her annual Schedule C net income. Assume that Luna paid $11,000 in Social Security taxes, and that she plans to pay off her mortgage at retirement, thereby relieving her of her only debt. Luna presently pays $1,500 per month toward the mortgage principal and interest. 

Based on the information provided herein, what do you expect Luna's wage replacement ratio to be at retirement?