User:Techno-Dann/NaNo2011

How I came up with these numbers: There's four variables to deal with. The starting population (P), the population at the time you're interested in (X), the percentage of people who don't vanish (r, .97), and the number of days that go by between P and X (d). It's ugly math, that looks like this: X = P * rd. To flip it the other way around, d = log(X/P)/log(r).

Now, here's some dates. I'm working off of current population estimates for everything, as those are easiest to find. Feel free to add to this list:

Day 0: Global population 6,970,000,000

Day 174: Global population reduced to 10%

Day 330: The United States is down to its population as of 1790

Day 348: Global population reduced to 1%

Day 614: 1000 people remain in the Seattle metropolitan area

Day 747: 1000 people remain in New York City

Day 785: 1000 people remain in Tokyo

Day 959: Tokyo reduced to 100 people

Day 1095: 10 people remain in New York City

Day 1133: Tokyo has 10 survivors

Day 1137: Seattle depopulated

Day 1191: 1000 people remain on the planet

Day 1269: New York City depopulated

Day 1307: Tokyo depopulated

Day 1365: Global population is 100

Day 1478: The United States of America is depopulated

Day 1539: 10 people remain on the planet

Day 1588: China depopulated

Day 1731: One person remains on the planet.