Exhibit 99.18 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-H KEY PERFORMANCE FACTORS MAY, 1999 Expected B Maturity 09/17/01 Blended Coupon 5.1353% Excess Protection Level 3 Month Average 6.50% May, 1999 7.58% April, 1999 5.18% March, 1999 6.73% Cash Yield 19.45% Investor Charge Offs 4.88% Base Rate 6.99% Over 30 Day Delinquency 4.89% Seller's Interest 6.97% Total Payment Rate 14.69% Total Principal Balance $ 41,914,776,221.36 Investor Participation Amount $ 1,200,000,000.00 Seller Participation Amount $ 2,922,256,702.87