Table:
0
A
B
C
D
E
1
Country
Airport
City
2012
Change (12/11)
2
South Africa
OR Tambo International Airport
Johannesburg
18,681,458
0 1.2%
3
Spain
Gran Canaria Airport
Las Palmas de Gran Canaria
9,892,067
0 6.1%
4
Spain
Tenerife Sur
Granadilla de Abona
8,530,729
0 1.5%
5
South Africa
Cape Town International Airport
Cape Town
8,505,563
0 0.8%
6
Morocco
Mohammed V International Airport
Casablanca
7,186,331
0 1.4%
7
Spain
Lanzarote Airport
San Bartolomé, Las Palmas
5,168,775
0 6.8%
8
South Africa
King Shaka International Airport
Durban
4,747,224
0 5.8%
9
Spain
Fuerteventura Airport
Puerto del Rosario
4,399,023
0 11.1%
10
Spain
Tenerife Norte
San Cristóbal de La Laguna
3,717,944
0 9.2%
11
Morocco
Marrakesh Menara Airport
Marrakesh
3,373,475
0 1.7%
12
Mauritius
Sir Seewoosagur Ramgoolam International Airport
Mauritius
2,490,862
0 3.7%
13
France
La Réunion Roland Garros Airport
Saint-Denis
1,997,800
0 4.2%
14
Ghana
Kotoka International Airport
Accra
1,726,051
0 8.9%
15
Morocco
Agadir–Al Massira Airport
Agadir
1,384,931
0 8.7%
16
South Africa
Port Elizabeth Airport
Port Elizabeth
1,316,063
0 3.7%
17
Tunisia
Monastir International Airport
Monastir
1,238,757
0 23.9%

Questions and formulas:
Question: When the city is agadir what is the change (12/11)?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="agadir"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E17,C2:C17="agadir"),5))
Level: medium