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