Top Referrers (Inbound Links) to CDC.gov
2012 Annual Summary
Analysis: The Top Referrer report lists the top 25 domains of external Web sites which link to CDC.gov. This is also referred to as inbound links, permanent links, or hard coded links to any page on CDC.gov.
For 2012, the Google search engine (U.S.) remained the top referrer accounting for 72% of the traffic to CDC.gov based on the top 10 referring domains. The Yahoo and Bing search engines account for 7%. Combined, the majority of traffic to CDC.gov in 2012 came from these three sites.
| Rank | Referring Domains | Instances |
| 1. | google.com | 96,971,232 |
| 2. | bing.com | 8,996,778 |
| 3. | yahoo.com | 7,808,669 |
| 4. | google.co.uk | 4,899,947 |
| 5. | google.ca | 4,869,671 |
| 6. | google.com.mx | 4,227,527 |
| 7. | google.com.au | 2,279,654 |
| 8. | google.co.in | 1,970,239 |
| 9. | nih.gov | 1,504,132 |
| 10. | google.com.co | 1,487,693 |
| 12. | google.es | 1,403,175 |
| 13. | facebook.com | 1,309,655 |
| 14. | govdelivery.com | 1,193,347 |
| 15. | google.com.ar | 1,120,436 |
| 16. | google.com.ph | 1,052,064 |
| 17. | ask.com | 980,589 |
| 18. | google.com.pe | 795,256 |
| 19. | wikipedia.org | 753,389 |
| 20. | choosemyplate.gov | 751,554 |
| 21. | google.cl | 718,713 |
| 22. | google.co.ve | 713,471 |
| 23. | aol.com | 618,233 |
| 24. | google.com.my | 562,465 |
| 25. | state.gov | 551,016 |
