Dear all,

Following is my dataset:

Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input str1 country float(year var3)
"A" 2001 2.4
"A" 2003 3.5
"A" 2009 6.9
"A" 2010 3.1
"B" 2002 6.4
"B" 2003 5.7
"B" 2004 8.3
"C" 2007 5.3
"C" 2008   8
"C" 2009 9.3
"C" 2010 7.3
"C" 2011 6.8
end
I would like to create a variable year which runs from 2001 to 2011, leaving the observation for var3 empty where there is no data available. The resulting data should look like this:
country year var3
A 2001 2.4
A 2002
A 2003 3.5
A 2004
A 2005
A 2006
A 2007
A 2008
A 2009 6.9
A 2010 3.1
A 2011
B 2001
B 2002 6.4
B 2003 5.7
B 2004 8.3
B 2005
B 2006
B 2007
B 2008
B 2009
B 2010
B 2011
C 2001
C 2002
C 2003
C 2004
C 2005
C 2006
C 2007 5.3
C 2008 8
C 2009 9.3
C 2010 7.3
C 2011 6.8
I would really appreciate your help. Thanks

Kusum