Exhibit 99.33 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-C KEY PERFORMANCE FACTORS April 30, 1999 Expected B Maturity 6/16/2003 Blended Coupon 5.1198% Excess Protection Level 3 Month Average 5.99% April, 1999 5.17% March, 1999 6.77% February, 1999 6.04% Cash Yield17.83% Investor Charge Offs 5.23% Base Rate 7.43% Over 35 Day Delinquency 4.87% Seller's Interest10.40% Total Payment Rate14.17% Total Principal Balance$42,469,994,217.25 Investor Participation Amount$750,000,000.00 Seller Participation Amount$4,418,074,698.76