I researched these comparative job trend graphs for my Keynote at the 2007 London Perl Workshop:
http://www.indeed.com/jobtrends?q=%22perl+developer%22%2C%22python+developer%22%2C+%22ruby+developer%22&l=>
http://www.indeed.com/jobtrends?q=%22perl+programmer%22%2C%22python+programmer%22%2C+%22ruby+programmer%22&l=>
http://www.indeed.com/jobtrends?q=%22perl+developer%22%2C%22python+developer%22%2C+%22ruby+developer%22%2C+%22cobol+developer%22%2C+%22c+developer%22%2C+%22c%23+developer%22%2C+%22java+developer%22%2C+%22c%2B%2B+developer%22&l=>
http://www.indeed.com/jobtrends?q=%22python+developer%22%2C%22python+programmer%22%2C%22perl+developer%22%2C%22perl+programmer%22%2C+%22javascript+developer%22&l=>
http://www.indeed.com/jobtrends?q=%22perl%22%2C%22python%22%2C+%22ruby%22&l=>
Re:Throw "PHP developer" in there
Tim Bunce on 2008-01-04T08:59:45
Really? Looks like "php developer" overtook "perl developer" back in October 06 and grew strongly during summer '07:
http://www.indeed.com/jobtrends?q=%22perl+developer%22%2C%22python+developer%22% 2C%22ruby+developer%22%2C+%22javascript+developer%22%2C%22php+developer%22&l=
PHP is a more of a niche language so I was ignoring it.
Re:Throw "PHP developer" in there
btilly on 2008-01-04T18:12:45
Really. The ratio between Perl and PHP is closer than the one between, say, Perl and Python.
And while you're right that PHP aims for a niche, it is a niche that Perl used to dominate, and lots of Perl people are still in. A "niche" that is bigger than Perl is a niche that Perl shouldn't sneer at.