How many countries in South America have a population greater than 20 million?
6
2
2
3
2
3
2
3
5
2
3
5
1
2
3
5
1
2
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
7
4
3
5
1
2
7
4
6
3
5
1
2
7
4
6
3
5
1
7
4
6
3
5
1
7
4
6
5
1
7
8
4
6
5
1
7
8
4
6
1
7
8
4
6
7
8
4
6
10
7
8
4
6
9
10
7
8
6
9
10
7
8
6
9
10
7
8
6
9
10
7
8
6
9
10
11
7
8
6
13
9
10
11
7
8
6
13
9
10
11
7
8
6
13
9
10
11
7
8
6
13
9
10
11
7
8
6
13
9
10
11
7
8
6
13
9
10
11
8
6
13
No
9
10
12
4 countries
11
8