Hi! I wanted to how to create a single line graph for a panel dataset? The dataset looks something like this:

Country Year GDP
A 2000 ...
A 2001 ,,,,
A 2002 ,,,
B 2000 ....
B 2001 ....
B 2002 ....
C 2000 ..
C 2001 ,,,
C 2002 ,...
I wanted to have a single line which takes all countries into one - not separate line graphs. GDP would be on the y axis and year on the x axis.