Answer this question: 
What are the top five countries in the world in terms of population?
As of 2021, the top 5 countries in the world in terms of population are:

1) China - estimated population of around 1.44 billion people
2) India - estimated population of around 1.39 billion people
3) United States - estimated population of around 332 million people
4) Indonesia - estimated population of around 272 million people
5) Brazil - estimated population of around 214 million people

Note that countries' population can vary over time and these counts are based on estimates.
Complete the following task based on the instruction and optional input provided.### Instruction:
Answer this question: 
What are the top five countries in the world in terms of population?

### Output:
As of 2021, the top 5 countries in the world in terms of population are:

1) China - estimated population of around 1.44 billion people
2) India - estimated population of around 1.39 billion people
3) United States - estimated population of around 332 million people
4) Indonesia - estimated population of around 272 million people
5) Brazil - estimated population of around 214 million people

Note that countries' population can vary over time and these counts are based on estimates.