How many countries have a population over 1 billion?
2
1
1
5
3
1
4
5
2
3
1
4
5
2
3
1
4
5
2
3
1
4
5
2
3
1
4
5
2
3
1
4
5
6
2
3
1
4
5
6
2
3
1
4
5
6
2
3
1
4
5
7
6
2
3
1
4
5
7
6
2
3
1
4
5
7
6
2
3
1
4
5
7
6
2
3
1
4
5
7
6
2
3
1
4
5
7
6
8
2
9
3
1
4
0
5
7
6
8
2
9
3
1
4
5
7
6
0
8
2
9
3
1
4
5
11
7
6
8
2
9
3
0
10
1
4
5
11
7
6
8
2
9
3
10
4
5
11
7
6
8
2
9
3
10
4
11
7
6
12
8
2
9
10
11
7
6
12
8
9
10
11
7
6
12
8
13
9
10
11
7
6
12
8
13
9
10
11
7
6
12
8
13
9
14
10
11
7
6
12
8
128
13
9
14
10
128
128
128
128
66