In 1950, the global population hit 2.5 billion.
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.
INSIDER Data found 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.
Image: Pilgrims hold umbrellas during Mass in Romania, 2019. Vadim Ghirda / AP
