How many countries were members of the original European Union?
6
13
13
13
13
15
13
14
15
13
28
14
15
10
9
13
28
14
15
10
9
13
28
14
15
10
9
13
28
14
15
10
25
9
13
28
14
15
10
25
12
9
13
28
14
15
10
25
7
12
9
13
28
14
15
10
25
7
12
9
27
5
13
28
14
15
10
25
7
12
9
27
5
13
28
14
19
15
10
25
7
12
9
27
5
13
28
14
19
15
10
11
25
7
12
9
27
5
13
28
14
19
15
10
11
25
7
12
9
27
5
13
28
14
19
15
10
11
25
7
12
9
20
27
5
13
28
24
14
19
15
10
11
25
7
12
9
20
27
5
13
28
24
14
19
15
10
11
25
7
12
9
20
27
5
13
28
24
8
14
19
15
31
10
11
25
7
12
9
20
27
5
28
24
8
14
19
15
31
10
11
25
7
12
9
20
27
5
28
24
8
17
14
19
48
23
15
31
10
13 countries
15 countries