Exhibit 99.15 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-C KEY PERFORMANCE FACTORS May 31, 1997 Expected B Maturity 4/16/01 Blended Coupon 5.8665% Excess Protection Level 3 Month Average 4.74% May, 1997 4.49% April, 1997 3.81% March, 1997 5.90% Cash Yield 17.28% Investor Charge Offs 4.53% Base Rate 8.26% Over 35 Day Delinquency 4.38% Seller's Interest 15.43% Total Payment Rate 12.75% Total Principal Balance $27,132,480,390.99 Investor Participation Amount $500,000,000.00 Seller Participation Amount $4,186,442,872.50