Consider the following information regarding corporate bonds:

$\backslash$table$[[$Rating$,$AAA,AA$,$A$,$BBB$,$BB$,$B$,$CCC$],[$Average Default Rate,$0\mathrm{.}0\%,0\mathrm{.}1\%,0\mathrm{.}2\%,0\mathrm{.}5\%,2\mathrm{.}2\%,5\mathrm{.}5\%,12\mathrm{.}2\%$