Alex sent me a link to Oleg’s post at livejounral where he publishes diagrams of Vlad’s analysis of salary rates which appeare at one of job websites. Despite I do not fully beleive the source, and the coverage is not big enough, the general trend is correct.
These graps shows the number of vacancies and the number of resumes which mention particular pay rates. I've converted them to Euros per year value.
People commenting that made a note that the shift in money might be caused of the shift in ages of Perl and PHP people.