[R] Plot graph

[cirtey]

Hi;
I want to obtain this graphic.
http://n4.nabble.com/file/n998283/plot.gif 
Instead whith my code :
par(mfrow=c(1,7),mar=c(0,0,0,0))
plot(EntreesMoyennesMensuelles2003, type="l",main="2003",col="yellow")
plot(EntreesMoyennesMensuelles2004, type="l",main="2004",col="red")
plot(EntreesMoyennesMensuelles2005, type="l",main="2005",col="blue")
plot(EntreesMoyennesMensuelles2006, type="l",main="2006",col="black")
plot(EntreesMoyennesMensuelles2007, type="l",main="2007",col="orange")
plot(EntreesMoyennesMensuelles2008, type="l",main="2008",col="purple")
plot(EntreesMoyennesMensuelles2009, type="l",main="2009",col="green")
I get this graph:
http://n4.nabble.com/file/n998283/plot1.gif 
How can I fix that?
Thanks
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