Well, one or two lines would have been sufficient to demonstrate the result.
Your CSV result data let assume, that there are no "RATING XXX" tag-fields, which contain some value.
You can check for and display existing values in the Mp3tag listview by setting up a column.
Column Name: PopMeter
Value: $if(%RATING WINAMP%,$repeat('#',%RATING WINAMP%),$if(%RATING WMP%,$repeat('*',%RATING WMP%),$if(%RATING MM%,$repeat('+',%RATING MM%),$repeat('=',$if2($ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,3})|\d+','$1'),196,5,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,3})|\d+','$1'),128,4,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,3})|\d+','$1'),64,3,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,2})|\d+','$1'),1,2,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d)|\d+','$1'),0,1,))))),0)))))
Sort by: $left($replace($if2(%RATING WINAMP%,$if2(%RATING WMP%,$if2(%RATING MM%,$if2($ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,3})|\d+','$1'),196,5,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,3})|\d+','$1'),128,4,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,3})|\d+','$1'),64,3,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,2})|\d+','$1'),1,2,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d)|\d+','$1'),0,1,))))),0)))),'.',)'0',2)
Numerical: no
... or simple values ...
Column Name: Rating
Value: $if2(%RATING WINAMP%,$if2(%RATING WMP%,$if2(%RATING MM%,$if2($ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,3})|\d+','$1'),196,5,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,3})|\d+','$1'),128,4,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,3})|\d+','$1'),64,3,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,2})|\d+','$1'),1,2,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d)|\d+','$1'),0,1,))))),))))
Sort by: $left($replace($if2(%RATING WINAMP%,$if2(%RATING WMP%,$if2(%RATING MM%,$if2($ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,3})|\d+','$1'),196,5,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,3})|\d+','$1'),128,4,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,3})|\d+','$1'),64,3,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d{1,2})|\d+','$1'),1,2,$ifgreater($regexp(%POPULARIMETER%,'^.+|(\d)|\d+','$1'),0,1,))))),0)))),'.',)'0',2)
Numerical: no
... or create one column for each rating tag-field.
DD.20150107.1737.CET