[R] Multiple line plots

[Mihai Nica]

Greetings,

I would like to plot three lines on the same figure, and I am lost. There is 
an answer to a similar thread… but I tried matplot and it is beyond me. An 
example of the data follows:

Year	EM	IM	BM
1983	9.1	16.8	-7.7
1984	12.0	18.0	-6.0
1985	13.6	19.1	-5.5
1986	12.4	17.3	-4.9
1987	14.6	20.3	-5.7
1988	20.6	23.3	-2.6
1989	25.0	27.2	-2.2
1990	28.4	30.2	-1.8
1991	33.3	31.2	2.1
1992	40.6	35.2	5.4
1993	41.6	39.9	1.7
1994	50.8	49.5	1.3
1995	46.3	61.7	-15.4
1996	56.8	73.0	-16.2
1997	71.4	85.9	-14.5
1998	79.0	94.7	-15.7
1999	87.0	109.7	-22.7
2000	111.7	135.9	-24.2
2001	101.5	131.4	-29.9
2002	97.5	134.6	-37.1
2003	97.4	138.1	-40.6
2004	110.8	155.8	-45.1

Thanks,

Mihai