plot dataframe with inconsistently relations

Hi @ all,
I work with a dataframe like the attached one.
I want to plot it, so that  "value" is listed on the y-axis, "year" on the
x-axis and "states" as lines in the coordinate system.
I tried the following code:

require(ggplot)
plot1<-ggplot(TEST, aes(year, value)) + geom_line(aes(colour = state))

The result could be very nice but the the lines are stacked.
Maybe there is an easier way to do that?

Thanks a lot for your help.
Geo



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