Exhibit 99.15 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-D KEY PERFORMANCE FACTORS March 31, 1999 Expected B Maturity 05/15/01 Blended Coupon 5.1217% Excess Protection Level 3 Month Average 6.20% March, 1999 6.77% February, 1999 6.09% January, 1999 5.73% Cash Yield 19.18% Investor Charge Offs 5.12% Base Rate 7.29% Over 35 Day Delinquency 4.94% Seller's Interest 6.34% Total Payment Rate 14.77% Total Principal Balance $40,628,355,078.94 Investor Participation Amount $1,000,000,000.00 Seller Participation Amount $2,576,435,560.45