Sankey Diagram

Hi,
I have a .csv hat is organized in this way:

code88;code13;sup_88_13
1;1;77.67576251
1;2;10.1
1;3;2.4
1;4;0.0
1;5;0.2
1;6;0.1
..............
I would create a simple Sankey diagram, how can I do it? I have little
experience with R unfortunately !
thanks

Giuseppe