The 30 biggest population shifts in recent history

July 11 is World Population Day.

To mark the occasion, INSIDER Data has found the 30 countries and territories with the biggest population shifts since 1950.

The United Arab Emirates had the most population growth on average, while Niue had the least.

Visit BusinessInsider.com for more stories.

When the global population hit 5 billion in 1987, the United Nations started World Population Day on July 11 to spotlight the growing number of people on the planet.

Today, there are 7.7 billion people in the world, and with refugee crises, wars, droughts, and changing work opportunities, populations in some countries are booming while others are shrinking.

By acknowledging the day, the UN hopes to mobilize political will and draw attention to population problems.

We're marking the occasion by looking at the 15 countries with the biggest population growth since 1950 and the 15 countries with the least population growth since 1950. Here are the results.