How many countries in the world have a population over 1 billion?
2
2
2
3
2
3
2
5
3
2
5
3
2
5
3
2
5
3
2
4
5
3
2
4
1
5
3
2
4
1
5
3
2
4
1
5
3
2
4
1
5
3
2
4
1
5
3
2
4
1
5
3
2
4
1
5
3
2
4
1
5
3
2
6
4
1
8
5
7
3
2
6
4
1
8
5
7
3
2
6
4
1
8
5
7
3
2
10
6
4
1
8
5
7
3
10
6
4
1
8
5
7
11
3
10
6
4
1
8
5
7
11
10
6
4
1
8
5
7
11
10
6
4
1
8
9
7
11
10
6
4
1
8
9
7
11
10
6
4
1
8
9
7
11
10
6
2 countries
4
1
4 countries
8
9
7
11
13
10
6
1
8
9
7
11
3 countries
13
10
6
8
9
7
11
13
10
6
8
9
7
11
6 countries
13
10
6
8
9
7
11
13
10
6
12
8
9
7
11
13
10
6
2 countries
4 countries
12
8 countries
8