Hi all,

I have a dta file with data set as :
fid year tbl_2001 tbl_2002 tbl_2003 tbl_2004 tbl_2005
2 2001 5 7 9 3 2
2 2002 5 7 9 3 2
2 2003 5 7 9 3 2
2 2004 5 7 9 3 2
2 2005 5 7 9 3 2
5 2001 6 1 8 4 3
5 2002 6 1 8 4 3
5 2003 6 1 8 4 3
5 2004 6 1 8 4 3
5 2005 6 1 8 4 3
7 2001 0 3 7 9 1
7 2002 0 3 7 9 1
7 2003 0 3 7 9 1
7 2004 0 3 7 9 1
7 2005 0 3 7 9 1

And I want to create a new variable “tbl” to replace variables (tbl_2001 --> tbl_2005) as the following data set :

fid year tbl
2 2001 5
2 2002 7
2 2003 9
2 2004 3
2 2005 2
5 2001 6
5 2002 1
5 2003 8
5 2004 4
5 2005 3
7 2001 0
7 2002 3
7 2003 7
7 2004 9
7 2005 1


- How can I get the value of year via the position of variable such as: year[1] = 2001, year [2] =2002
- Do you have any suggestions to change the data set?

Thank you in advance.

Hut98