Here are some details. We grew from 2,943 caches on May 30, 2007 to 6,260 caches on Dec. 7, 2008. That was a gain of 3,317 geocaches, which was a 113% increase during those 18 months. That equates to approximately 184 new active caches per month. If you clicked on the link above to my previous post, you saw that our previous rate was 155 new caches per month, so you have really picked up the pace during the past year.
In terms of population, we currently have 209.9 caches per 100,000 population, which ranks us 21st on the list of 143 worldwide regions. (Previously we were at 140.4 and in 28th place.)
Once again, the numbers included in the spreadsheet are ACTIVE cache figures. Reviewers have actually reviewed more caches than those numbers indicate. The numbers are the net of total caches submitted minus those that have been archived and minus those that were not approved for listing.
In case you're interested, the state with the most caches per 1,000 sq kilometers is Rhode Island, with 307.3. Alaska has the fewest caches per 1,000 sq kilometers with 1.6. The state with the most caches per 100,000 population is Utah with 523.5. New Jersey has the fewest caches per 100,000 population at 60.9.