Table:
0
A
B
C
D
E
F
1
Episode
Date
Official rating 4+
Share 4+
Official rating 16-39
Share 16-39
2
1
7 March 2010
4 577 667
27,99%
1 970 605
25,68%
3
2
14 March 2010
4 670 450
28,12%
1 986 662
25,36%
4
3
21 March 2010
4 633 925
28,32%
1 910 852
25,35%
5
4
28 March 2010
4 480 723
26,59%
1 804 227
23,30%
6
5
4 April 2010
3 848 158
25,79%
1 514 605
22,99%
7
6
25 April 2010
4 041 457
25,30%
1 528 083
21,99%
8
7
2 May 2010
3 710 595
26,42%
1 296 170
22,72%
9
8
9 May 2010
3 981 377
25,41%
1 616 681
23,34%
10
9
16 May 2010
4 363 045
27,26%
1 672 686
23,86%
11
10
23 May 2010
4 021 094
26,48%
1 430 880
21,49%
12
11
30 May 2010
3 777 830
24,40%
1 421 244
20,94%
13
12
13 June 2010
4 575 752
30,03%
1 718 196
26,11%

Questions and formulas:
Question: When did the official rating 4+ reach 4 633 925?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="4 633 925"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F13,C2:C13="4 633 925"),2))
Level: medium