How many US presidents have been unanimously elected?
1
2
2
1
2
1
2
1
2
3
1
4
2
3
1
4
2
3
1
4
2
3
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
2
3
5
1
4
2
7
3
5
1
4
2
7
3
5
1
4
2
7
0
3
5
1
4
2
7
6
3
5
1
4
0
2
7
6
3
5
1
4
0
7
6
3
5
1
4
7
6
3
5
4
7
6
3
5
4
8
7
6
3
5
4
8
7
6
5
8
7
6
5
13
8
7
6
9
5
13
8
7
6
9
5
13
8
7
6
9
13
8
7
6
9
13
8
7
6
9
13
8
7
6
9
13
11
8
7
6
9
13
11
8
7
6
9
10
13
11
8
7
6
9
10
13
No
11
8
12
6
9
10
13
No
11
8
12
6
9
10
13
No
11
8
12
6
9
10
269