birth rate. the number of live births each year for every 1000 people living in a place.

Fertility. refers to the number of live births. Demographers use several measures of fertility. One measure is the crude birth rateThe number of live births for every 1,000 people in a population in a given year., or the number of live births for every 1,000 people in a population in a given year.

The average global birth rate was 18.5 births per 1,000 total population in 2016.

As of 2020, the CIA estimates the U.S. crude death rate will be 8.3 per 1,000, while it estimates that the global rate will be 7.7 per 1,000.

Niger

10 Least Popular Birthdays

• December 24th.
• July 4th.
• January 2nd.
• December 26th.
• November 27th.
• November 23rd.
• November 25th.
• October 31st.

The Most Common Birthdays in the World

Except in those century years without a leap day, Feb. 29 occurs once every 1,461 days, making it the rarest of birthdays.

Research in the journal Human Reproduction shows that 535 males were conceived in the most fertile month of autumn as opposed to 464 females, while only 487 males were conceived, compared with 513 females, in the worst month of spring.

People born on a leap year day — February 29 — are often called “leaplings” or “leapers.” But instead of waiting every four years to celebrate their birthdays, most blow out their candles on February 28 or March 1. I asked her if she’d encountered any other oddities growing up a leap day baby.