How many countries have over 1 billion population?
2
1
3
1
5
2
4
3
1
5
2
4
3
1
5
2
4
3
1
5
2
4
3
1
5
2
4
3
1
5
2
4
3
1
5
2
6
4
3
1
5
2
6
4
3
1
5
7
2
6
4
3
1
5
7
2
6
4
3
1
5
7
2
6
4
3
1
5
7
2
6
4
3
1
5
7
2
6
4
3
1
5
8
7
2
6
4
3
1
0
5
9
8
7
2
6
4
3
1
5
9
8
7
2
6
4
11
3
1
5
9
8
7
2
10
6
4
11
3
1
5
9
8
7
2
10
6
4
11
3
1
5
9
8
7
2
10
6
4
11
3
5
9
8
7
2
10
6
4
12
11
13
9
8
7
10
6
12
11
13
9
8
7
10
6
12
11
13
9
8
7
14
10
6
12
11
13
9
8
7
14
10
6
12
11
13
9
8
7
14
10
6
12
11
128
128
66
128
62
128
63