{
  "AAA": 90,
  "AA+": 87,
  "AA": 83,
  "AA-": 80,
  "A+": 77,
  "A": 73,
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  "BBB+": 67,
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  "BBB-": 60,
  "BB+": 57,
  "BB": 53,
  "BB-": 50,
  "B+": 47,
  "B": 43,
  "B-": 40,
  "CCC": 30,
  "CC": 20
}