.G1
ticks bot out from 10 to 70 by 10 ""
ticks bot out at 0 "1900", 40 "1940", 80 "1980"
label bot "World Record One Mile Run"
label left "Time" "(seconds)" left .4
lastyear=99; lastrec=0
copy "speedman.d" thru {
lastyear = min($1, lastyear)
lastrec = max($2, lastrec)
line from lastyear, lastrec to $1, lastrec
lastyear = $1; lastrec = $2
}
line from lastyear, lastrec to 89, lastrec
.G2