The figures, found on page 7, breakdown like this:Doran & Zimmerman (2009) relied upon 79 self-selected earth scientists (qualifications unstated) who claimed to have published something on climate change recently [Figure 5].
These were drawn from a field of 3,146 respondents, many of whom protested the style of questionnaire on grounds that it is inherently unscientific to ask an opinion question, with no scientific parameters, on an empirical topic. The actual survey numbers are broken down below. [Figure 6]
7,111 non-respondents to the survey
3,069 ignored responses
75 affirmed responses
2 negative responses
75/77 = 97%
Total surveys submitted to field scientists, 10,257. 3,146 respondents to the survey yet only 75 of the 77 is the pool of response they cherry picked is creates that 97% figure people like to bandy about.
The survey with the highest affirmation % of AGW by scientists in the field was a 66/34 split. My 60/40 wasn't so far off.