7,000,000,000

That's how many people there are now on our planet.

Interesting. I thought out of boredom, and since having worked for the census bureau for 3 months I am obviously an expert on population (not really), I would put together a collection of interesting stats based on that number.

When I was born, on January 30th, 1986 there were 4,912,946,909 people alive, according to a cool little calculator on the BBC website I used. You can use it here The world population has since increased by 30%, or roughly 1.2% per year.

3,563,000,000 people on the planet are female.
485,000,000 of those fall within an age range in which I would consider dating. (20-29)

1,400,000,000 people on the planet currently have a viral STD.
That leaves 388,000,000 for me to date if I disqualify those with STD's.

700,000,000 left handed people are alive today.
This means only 38.8 million of the dateable people for me would have to eat dinner sitting to my left.

94.5 million "geniuses" (People with an IQ over 145) are currently living today.
This leaves 27,000 females who would be around my age, STD free and intelligent enough for me to date (I'm obviously kidding about this one. I prefer intelligence around my own, which is clearly below IQ=145)

There are 57,308,738 square miles of land on the planet.
That is roughly 21,200 square meters of land per person. That is a box which is 145 meters on each side or about 1.5 football fields.

This area obviously varies by the resolution in which you look at the planet. Here along the Wasatch Front, I obviously do not have that much area to myself, but using the resolution of the whole state of Utah I have about 4x that.

7,000,000,000 seconds ago George Washington was about 6 months into his role as president of the newly formed United States of America.
There are roughly 7,000,000,000 separate bits of information in the Xbox 360 video-game Dragon Age 2.
There are 7,000,000,000 bytes of data in 70 yards of physical books on a shelf if you converted them to e-books.
7 billion years ago, the nebula which would later condense and ignite and be called the sun by 7 billion people hadn't even begun to form.
The number of base pairs in the human genome is less than half of that number, at just over 3 billion.

According to BP's estimate of 1,333 billion barrels of oil remaining on planet Earth. This is roughly 8,000 gallons of crude oil per person.

When considering the refining process used to extract gasoline usable by your car from crude oil and using the average quality of oil found on the planet we end up with approximately 19.5 gallons of gas per 42 gallon (1 barrel) of crude oil. This lowers the number to 3,700 gallons of gasoline per person remaining.

Using my car as an example (a 2010 Subaru WRX), I can drive to Los Angeles and back to Salt Lake City 67 times with that much gasoline. (Fortunately for Americans, no one uses as much gas as we do...)

Using the current population growth rate of 0.012 (or 1.2%) per year and a continuously compounding growth curve the world population would hit

8 billion : 2023
9 billion : 2033
10 billion : 2041

and would be at 13.5 billion when I die, assuming I live 80 years.

Most people who study this stuff expect a decline in population growth.

60% of the 7 billion people on the planet live in Asia.

When comparing population percentage to land area per continent it looks like this.

Asia: 60.4% pop, 30% land area, Ratio = 2.0
Africa: 14.5% pop, 20.3% land area, Ratio = 0.71
Europe: 10.9% pop, 6.7% land area, Ratio = 1.6
South America: 8.5% pop, 12.6% land area, Ratio = 0.67
North America : 5.0% pop, 16.3% land area, Ratio = 0.31
Oceania: 0.50% pop, 5.2% land area, Ratio = 0.096

The ratio is essentially useless, except for comparing population density to the entire world, which would have a ratio of 1.0.

In an estimate done by Carl Haub of the Population reference Bureau, 106 billion people have lived on Earth throughout history.

Having evolved roughly 200,000 years ago and given a world life expectancy of 69.4 years, this says the average person who will die today has seen 0.035% of human history, but had they met every person on the planet, they would have met 6.6% of all humans to have ever lived.

I should have been a statistician.