1. The first ranking position in the search results receives 42.25% of all click-through traffic
  2. The second position receives 11.94%
  3. Third position on the first page obtains 8.47%
  4. The fourth placed position on page one receives 6.05%
  5. The others on the first page are under 5% of click through traffic
  6. The first ten results (page one ) received 89.71% of all click-through traffic,
  7. The next 10 results (normally listed on the second page of results) received 4.37%
  8. Third page receives a total  of 2.42 %
  9. The fifth page receives a total of only 1.07%
  10. All other pages of results received less than 1% of total search traffic clicks.

Source: http://www.seomoz.org/blog

Denis Finnegan is SEO and Internet marketing specialist Finn Media Ltd