Here is some well reasoned opinion on the subject of programming languagues. The links at the end are rather nice.

All you seen to have proven with your stats (if anything given their dubious validity) is that Perl and Java have remained static for popularity whilst Python has made inroads. You might reflect that Python is the core language at Google. Does this give Google a Python bias? Do would be Googlers learn Python just in case they get that call? Do I care?

def language(perl,python):
    try:
        return perl/python
    except ZeroDivisionError:
        return perl
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