American Express USCS Card Member Loans 30 Days Past Due Loans As A % Of Total 1.1 % At July End, Card Member Loans Net Write-Off Rate-Principal Only 1.7% At July End; U.S. Small Business Card Member Loans 30 Days Past Due Loans As A% Of Total 1.3% At July End, Card Member Loans Net Write-Off Rate-Principal Only 2.6% At July End