Table:
year
song
peak chart positions
album

icl
bel (fl) tip
can
den
ger
irl
uk

1999
svefn-g-englar
-
-
-
-
-
-
146
agætis byrjun

2000
ny batteri
-
-
-
-
-
-
133

2003
untitled #1
-
-
4
20
98
31
72
( )

2005
glosoli
1
-
-
-
-
-
-
takk..

hoppipolla
-
-
-
-
-
-
24

2006
sæglopur
-
-
-
-
-
-
-

2007
hljomalind
-
-
-
-
-
-
91
hvarf/heim

2008
gobbledigook
9
19
-
-
-
-
-
með suð i eyrum við spilum endalaust

inni mer syngur vitleysingur
8
16
-
-
-
-
152

2009
við spilum endalaust
-
4
-
-
-
-
-

2012
ekki mukk
-
-
-
-
-
-
-
valtari

varuð
-
82
-
-
-
-
-

2013
brennisteinn
14
-
-
-
-
-
-
kveikur

isjaki
12
36
-
-
-
-
-

2016
oveður
-
-
-
-
-
-
-
non-album single

2017
a
-
-
-
-
-
-
-
non-album single

"-" denotes a title that was not released or did not chart in that territory

Statement: in 2012, sigur ros released "ekki mukk", from their sixth album valtari, which was also released in 2012.
Question: when did the single "ekki mukk" release?
Answer: [2012.0]