Table:
0
A
B
C
D
E
1
Period
% trains arriving within 5 mins of scheduled time (over three months)
Change over same quarter the previous year
% trains arriving within 5 mins of scheduled time Moving Annual Average (MAA)
Change over previous year as a whole
2
Apr - Jun 2007
91.4%
Up 0.8%
89.0%
Up 0.2%
3
Jul - Sep 2007
93.0%
Up 2.2%
89.6%
Up 0.7%
4
Oct - Dec 2007
87.3%
Up 2.8%
90.1%
Up 0.6%
5
Jan - Mar 2008
90.5%
Up 2.0%
90.6%
Up 0.6%
6
Apr - Jun 2008
93.6%
Up 2.4%
91.1%
Up 0.6%
7
Jul - Sep 2008
92.8%
Down 0.2%
91.0%
Up 0.4%
8
Oct - Dec 2008
86.5%
Down 0.9%
90.9%
Up 0.3%
9
Jan - Mar 2009
89.6%
Down 1.0% >
90.6%
Down 0.3%
10
Apr - Jun 2009
93.0%
Down 0.6%
90.5%
Down 0.1%
11
Jul - Sep 2009
93.5%
Up 0.9%
90.7%
Up 0.2%
12
Oct - Dec 2009
86.7%
Up 0.2%
90.7%
Unchanged
13
Jan - Mar 2010
89.5%
Down 0.1%
90.7%
Unchanged
14
Jul - Sep 2010
94.5%
Up 1.1%
91.4%
Up 0.8%
15
Oct - Dec 2010
78.4%
Down 9.6%
92.9%
Up 2.4%

Questions and formulas:
Question: What's the change over previous year as a whole in the period in which the change over same quarter the previous year was up 2.8%?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="Up 2.8%"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,C2:C15="Up 2.8%"),5))
Level: medium
Question: When was the percentage of trains arriving within 5 minutes of scheduled time 89.6%?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="89.6%"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,D2:D15="89.6%"),1))
Level: medium
Question: What's the change over same quarter the previous year in the period when the 89.6% of the trains arrive within 5 minutes of scheduled time (over three months)?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="89.6%"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,B2:B15="89.6%"),3))
Level: medium