Exhibit 99.41 MBNA MASTER CREDIT CARD TRUST II SERIES 1999-G KEY PERFORMANCE FACTORS December 31, 1999 Expected B Maturity 07/15/2004 Blended Coupon 6.4372% Excess Protection Level 3 Month Average 5.45% December, 1999 4.58% November, 1999 5.73% October, 1999 6.04% Cash Yield19.14% Investor Charge Offs 5.04% Base Rate 9.52% Over 30 Day Delinquency 4.63% Seller's Interest11.35% Total Payment Rate14.35% Total Principal Balance$49,947,826,881.37 Investor Participation Amount$750,000,000.00 Seller Participation Amount$5,671,007,362.88